Do my best to translate this into english.. :-)

Some parts were so incomprehensible that I had to excise them
entirely, but I did my best with the material provided.
This commit is contained in:
jkh 1995-05-21 17:32:35 +00:00
parent 4a787e15cb
commit b2a7bc9fdd
2 changed files with 392 additions and 396 deletions

View File

@ -1,5 +1,5 @@
.\" manual page [] for ppp 0.94 beta2 + alpha
.\" $Id: ppp.8,v 1.4 1995/03/12 12:03:48 amurai Exp $
.\" $Id: ppp.8,v 1.5 1995/05/21 10:52:05 jkh Exp $
.\" SH section heading
.\" SS subsection heading
.\" LP paragraph
@ -17,56 +17,55 @@ ppp \- Point to Point Protocol (aka iijppp)
]
.SH DESCRIPTION
.LP
This is user process \fIPPP\fR software package. Normally, \fIPPP\fR
is implemented as a part of kernel and hard to debug and/or modify its
behavior. (i.e. pppd) However, in this implementation, \fIPPP\fR is
implemented as a user process with the help of tunnel device driver.
This is a user process \fIPPP\fR software package. Normally, \fIPPP\fR
is implemented as a part of the kernel (e.g. pppd) and it's thus somewhat
hard to debug and/or modify its behavior. However, in this implementation
\fIPPP\fR is done as a user process with the help of the tunnel device driver.
.LP
.SH Major Features
.TP
o Provide interactive user interface.
Using its command mode, user can
easily enter commands to establish the connection with the peer, check
the status of connection, and close the connection. And now, all
functions has password protected if describe your hostname/password in
secret file or exist secret file itself.
o Provides interactive user interface.
Using its command mode, the user can
easily enter commands to establish the connection with the remote end, check
the status of connection, and close the connection. All functions can
also be optionally password protected for security.
.TP
o Supports both of manual and automatic dialing.
Interactive mode has ``term'' command which enables you to talk to your modem
directory. When your modem is connected to the peer, and it starts to
speak \fIPPP\fR, \fIPPP\fR software detects it and turns into packet
mode automatically. Once you have convinced how to connect with the
peer, you can write chat script to define necessary dialing and login
procedure for later convenience.
o Supports both manual and automatic dialing.
Interactive mode has a ``term'' command which enables you to talk to your modem
directly. When your modem is connected to the remote peer and it starts to
talk \fIPPP\fR, the \fIPPP\fR software detects it and switches to packet
mode automatically. Once you have determined the proper sequence for connecting
with the remote host, you can write a chat script to define the necessary dialing
and login procedure for later convenience.
.TP
o Supports on-demand dialup capability.
By using auto mode, \fIPPP\fR
program will act as a daemon and wait for the packet send to the peer.
Once packet is found, daemon automatically dials and establish the
By using auto mode, the \fIPPP\fR
program will act as a daemon and wait for a packet to be sent over the \fIPPP\fR
link. When this happens, the daemon automatically dials and establishes the
connection.
.TP
o Supports server mode by direct mode.
Can act as server which accept incoming \fIPPP\fR connection.
o Supports server-side \fIPPP\fR connections.
Can act as server which accepts incoming \fIPPP\fR connections.
.TP
o Supports PAP and CHAP authentification.
o Supports PAP and CHAP authentication.
.TP
o Supports Proxy Arp.
\fIPPP\fR is set up as server, you can also set up doing a proxy arp
When \fIPPP\fR is set up as server, you can also configure it to do proxy arp
for your connection.
.TP
o Supports packet filtering.
User can define four kinds of filters;
ifilter for incoming packet, ofilter for outgoing packet, dfilter to
define dialing trigger packet and afilter to keep alive a connection
by trigger packet.
User can define four kinds of filters:
ifilter for incoming packets, ofilter for outgoing packets, dfilter to
define dialing trigger packet and afilter to keep a connection alive with
the trigger packet.
.TP
o Tunnel driver supports bpf.
@ -77,53 +76,60 @@ o Supports \fIPPP\fR over TCP capability.
.TP
o Supports IETF draft Predictor-1 compression.
\fIPPP\fR has a not only a VJ-compress but also Predictor-1
commpression. Normally a modem has a compression (i.e. v42.bis) and
system should accept a high speed/expand date from modem. The
Predictor-1 compression will compress whole packet data by system not
like a VJ-compress. So it will reduce system overhead by SIO's
interruption because of reducing data traffic between modem and SIO.
\fIPPP\fR supports not only VJ-compression but also Predictor-1
compression. Normally, a modem has built-in compression (e.g. v42.bis)
and the system may receive higher data rates from it as a result of
such compression. While this is generally a good thing in most
other situations, this higher speed data imposes a penalty on
the system by increasing the number of serial interrupts the system
has to process in talking to the modem. Unlike VJ-compression,
Predictor-1 compression pre-compresses \fBall\fR data flowing through
the link and thus reduces traffic to a minimum.
.TP
o Runs under BSDI-1.1 and FreeBSD-1.1.
o Runs under BSDI-1.1 and FreeBSD.
Patch for NeXTSTEP 3.2 is also available on the net.
.SH GETTING STARTED
.LP
When you run \fIPPP\fR, you might need to check and setup
configuration. First your kernel should include a tunnel
device. if not, you should re-config your kernel and re-
build including follows line.
When you first run \fIPPP\fR, you may need to deal with some
initial configuration details. First, your kernel should
include a tunnel device (the default in FreeBSD 2.0.5 and later).
If it doesn't, you'll need to rebuild your kernel with the following
line in your kernel configuration file:
.TP
pseudo-device tun 1
.LP
Last word indicates a number of tunnel device as equivalent
for number of \fIPPP\fR connection.
You should set the numeric field to the maximum number of
\fIPPP\fR connections you wish to support.
.LP
Second, check special(device) file for tunnel device named as
/dev/tun0. If not, you can create by type "MAKEDEV tun0"
Second, check your /dev directory for the tunnel device entry
/dev/tun0. If it doesn't exist, you can create it by running
"MAKEDEV tun0"
.SH MANUAL DIALING
.LP
% ppp
User Process PPP written by Toshiharu OHNO.
-- If you write your hostname and password in ppp.secret, you can't do anything except quit and help command --
-- If you set your hostname and password in /etc/ppp/ppp.secret, you can't do
anything except run the quit and help commands --
ppp on "your hostname"> help
passwd : Password for manupilation
quit : Quit PPP program
passwd : Password for security
quit : Quit the PPP program
help : Display this message
ppp on tama> pass <password>
-- "on" change to "ON" if you type correct password.
-- "on" will change to "ON" if you specify the correct password.
ppp ON tama>
-- You can specify modem and device name using following commands.
-- You can specify the device name and speed for your modem using
the following commands:
ppp ON tama> set line /dev/cuaa0
@ -148,15 +154,15 @@ ppp ON tama> term
-- PPP started in remote side ---
-- When peer start to speak PPP, the program will detect it
-- automatically and back to command mode.
-- When the peer start to talk PPP, the program will detect it
-- automatically and return to command mode.
ppp ON tama>
\fBPPP\fR ON TAMA>
-- NOW, you are get connected !! Note that prompt has changed to
-- capital letters
-- NOW, you are connected! Note that prompt has changed to
-- capital letters to indicate this.
PPP ON tama> show lcp
@ -165,12 +171,12 @@ PPP ON tama> show lcp
PPP ON tama> show ipcp
-- You'll see IPCP status --
-- At this point, your machine has host route to the peer.
-- If your want to add default route entry, then enter
-- At this point, your machine has a host route to the peer.
-- If you want to add a default route entry, then enter
PPP ON tama> add 0 0 HISADDR
-- Here string `HISADDR' represents IP address of connected peer.
-- Here string `HISADDR' represents the IP address of connected peer.
PPP ON tama>
@ -182,7 +188,7 @@ PPP ON tama> show log
PPP ON tama> close
-- Connection is closed, and modem will be hanged.
-- Connection is closed and modem will be disconnected.
ppp ON tama> quit
@ -192,9 +198,9 @@ ppp ON tama> quit
.SH AUTOMATIC DIALING
.LP
To use automatic dialing, you must prepare Dial and Login chat script.
See example definition found in ppp.conf.sample (Format of ppp.conf is
pretty simple.)
To use automatic dialing, you must prepare some Dial and Login chat scripts.
See the example definitions in /etc/ppp/ppp.conf.sample (the format of ppp.conf is
pretty simple).
.TP 2
o
@ -202,23 +208,22 @@ Each line contains one command, label or comment.
.TP 2
o
Line stating with # is treated as a comment line.
A line starting with a `#' character is treated as a comment line.
.TP 2
o
Label name has to start from first column and should be followed by colon (:).
A label name has to start in the first column and should be followed by a colon (:).
.TP 2
o
Command line must contains space or tab at first column.
A command line must contain a space or tab in the first column.
.LP
If ppp.conf is ready, specify destination label name when you invoke
ppp. Commands associated with destination label is executed when ppp
command is invoked. Note that commands associated with ``default''
label is ALWAYS executed.
Once ppp.conf is ready, specify the destination label name when you invoke
ppp. Commands associated with the destination label are then executed.
Note that the commands associated with the ``default'' label are ALWAYS executed.
Once connection is made, you'll find that prompt is changed to
Once the connection is made, you'll find that prompt has changed to
capital \fIPPP\fR on tama>.
@ -229,18 +234,18 @@ Once connection is made, you'll find that prompt is changed to
login OK!
PPP ON tama>
If ppp.linkup file is available, its contents are executed when
\fIPPP\fR link is connected. See example which add default route.
The string HISADDR matches with IP address of connected peer.
If an /etc/ppp/ppp.linkup file is available, its contents are executed when
the \fIPPP\fR connection is established. See the provided example which adds
a default route. The string HISADDR represents the IP address of the remote peer.
.SH DAIL ON DEMAND
.SH DIAL ON DEMAND
.LP
To play with demand dialing, you must use -auto option. Also, you
must specify destination label with proper setup in ppp.conf. It must
contain ``ifaddr'' command to define peer's IP address. (refer
/etc/ppp/ppp.conf.sample)
To play with demand dialing, you must use the -auto option. You
must also specify the destination label in /etc/ppp/ppp.conf to use.
It should contain the ``ifaddr'' command to define the remote
peer's IP address. (refer to /etc/ppp/ppp.conf.sample)
% ppp -auto pm2demand
@ -248,8 +253,9 @@ contain ``ifaddr'' command to define peer's IP address. (refer
%
.LP
When -auto is specified, \fIPPP\fR program works as a daemon. But,
you are still able to use command features to check its behavior.
When -auto is specified, \fIPPP\fR program runs as a daemon but
you can still configure or examine its configuration by using
the diagnostic port as follows:
% telnet localhost 3000
@ -267,52 +273,53 @@ you are still able to use command features to check its behavior.
....
.LP
Each ppp has associated port number, which is computed as "3000 +
tunnel_device_number". If 3000 is not good base number, edit defs.h.
When packet toward to remote network is detected, \fIPPP\fR will take
dialing action and try to connect with the peer. If dialing is failed,
program will wait for 30 seconds. Once this hold time expired, It's
re-dialing with previous trigger packets.
Each ppp daemon has an associated port number which is computed as "3000 +
tunnel_device_number". If 3000 is not good base number, edit defs.h in
the ppp sources (/usr/src/usr.sbin/ppp) and recompile it.
When an outgoing packet is detected, \fIPPP\fR will perform the
dialing action (chat script) and try to connect with the peer. If dialing fails,
it will wait for 30 seconds and retry.
To terminate program, type
To terminate the program, type
PPP ON tama> close
\fBppp\fR ON tama> quit all
.LP
Simple ``quit'' command will terminates telnet connection, but
\fIPPP\fR program itself is not terminated. You must use ``quit all''
to terminate the program running as daemon.
A simple ``quit'' command will terminate the telnet connection but
not the \fIPPP\fR program itself. You must use ``quit all'' to terminate
the \fRPPP\fR program as well.
.LP
.SH PACKET FILTERING
.LP
This implementation supports packet filtering. There are three filters; ifilter, ofilter and dfilter. Here's some basics.
This implementation supports packet filtering. There are three kinds of filters:
ifilter, ofilter and dfilter. Here are the basics:
.LP
.TP
o Filter definition has next syntax.
o A filter definition has the following syntax:
set filter-name rule-no action [src_addr/src_width] [dst_addr/dst_width]
[proto [src [lt|eq|gt] port ] [dst [lt|eq|gt] port] [estab]
a) filter-name should be ifilter, ofilter or dfiler.
b) There are two actions permit and deny. If given packet is matched
against the rule, action is taken immediately.
b) There are two actions: permit and deny. If a given packet is matched
against the rule, the associated action is taken immediately.
c) src_width and dst_width works like a netmask to represent address range.
c) src_width and dst_width works like a netmask to represent an address range.
d) proto must be one of icmp, udp or tcp.
.TP
o Each filter can hold upto 20 rules.
Rule number starts from 0. Entire rule set is not effective until rule 0 is defined.
o Each filter can hold up to 20 rules, starting from rule 0.
The entire rule set is not effective until rule 0 is defined.
.TP 2
o
If no rule is matched with a packet, that packet will be discarded (blocked).
If no rule is matched to a packet, that packet will be discarded (blocked).
.TP
o Use ``set filer-name -1'' to flush all rules.
@ -321,160 +328,161 @@ o Use ``set filer-name -1'' to flush all rules.
See /etc/ppp/ppp.conf.filter.example
.LP
.SH RECEIVE INCOMING PPP CONNECTION
.SH RECEIVING INCOMING PPP CONNECTIONS
.LP
To receive incoming \fIPPP\fR connection request, follow next steps.
To handle an incoming \fIPPP\fR connection request, follow these steps:
.LP
a) Make sure modem and /etc/rc.serial is setting up correctly.
- Use HardWare Handshake (CTS/RTS) for flow controlling.
- Modem should be setup NO echo back (ATE0) and
No results string (ATQ1)
a) Make sure the modem and (optionally) /etc/rc.serial is configured correctly.
- Use Hardware Handshake (CTS/RTS) for flow control.
- Modem should be set to NO echo back (ATE0) and NO results string (ATQ1)
b) Edit /etc/ttys to enable getty on the port where modem is attached.
b) Edit /etc/ttys to enable a getty on the port where the modem is attached.
For example:
ttyd1 "/usr/libexec/getty std.38400" dialup on secure
Don't forget to send HUP signal to init process.
Don't forget to send a HUP signal to the init process to start the getty.
# kill -HUP 1
c) Prepare account for incoming user.
c) Prepare an account for the incoming user.
ppp:xxxx:66:66:PPP Login User:/home/ppp:/usr/local/bin/ppplogin
d) Create /usr/local/bin/ppplogin file with next contents.
d) Create a /usr/local/bin/ppplogin file with the following contents:
#!/bin/sh
/usr/sbin/ppp -direct
You can specify label name for further control.
You can specify a label name for further control.
.LP
Direct mode (-direct) lets \fIPPP\fR to work with standard in and
out. Again, you can telnet to 3000 to get command mode control.
Direct mode (-direct) lets \fIPPP\fR work with stdin and stdout.
You can also telnet to 3000 to get command mode control, as with
client-side \fIPPP\fR.
.LP
.SH SETTING IDLE TIMER
.LP
To check/set idletimer, use ``show timeout'' and ``set timeout'' command.
To check/set idletimer, use the ``show timeout'' and ``set timeout'' commands.
.LP
Ex. ppp ON tama> set timeout 600
.LP
Timeout period is measured in secs and default value is 180 or 3 min. To disable idle timer function, use ``set timeout 0''.
The timeout period is measured in seconds, the default value for which is 180 or 3 min.
To disable the idle timer function, ``set timeout 0''.
.LP
.LP
In -auto mode, idle timeout cause \fIPPP\fR session closed. However,
\fIPPP\fR program itself is keep running. Another trigger packet cause
dialing action.
In -auto mode, an idle timeout causes the \fIPPP\fR session to be closed, though
the \fIPPP\fR program itself remains running. Another trigger packet will cause it
to attempt to reestablish the link.
.LP
.SH Predictor-1 compression
.LP
This version supports CCP and Predictor type 1 compression based on
current IETF-draft specs. As a default behavior, \fIPPP\fR will
propose to use (or willing to accept) this capability and use it if
peer agrees (or requests).
the current IETF-draft specs. As a default behavior, \fIPPP\fR will
attempt to use (or be willing to accept) this capability when the
peer agrees (or requests it).
.LP
.LP
To disable CCP/predictor function completely, use ``disable pred''
and ``deny pred'' command.
To disable CCP/predictor functionality completely, use the ``disable pred''
and ``deny pred'' commands.
.LP
.SH Controlling IP address
.LP
\fIPPP\fR uses IPCP to negotiate IP addresses. Each side of node
informs IP address that willing to use to the peer, and if requested
IP address is acceptable, \fIPPP\fR returns ACK to
requester. Otherwise, \fIPPP\fR returns NAK to suggest the peer to use
different IP address. When both side of nodes agrees to accept the
received request (and send ACK), IPCP is reached to open state and
network level connection is established.
\fIPPP\fR uses IPCP to negotiate IP addresses. Each side of the connection
specifies the IP address that it's willing to use, and if the requested
IP address is acceptable then \fIPPP\fR returns ACK to the requester.
Otherwise, \fIPPP\fR returns NAK to suggest that the peer use a
different IP address. When both sides of the connection agree to accept the
received request (and send ACK), IPCP is set to the open state and
a network level connection is established.
.LP
To control, this IPCP behavior, this implementation has ``set
ifaddr'' to define MY and HIS IP address.
To control this IPCP behavior, this implementation has the ``set ifaddr'' command
for defining the local and remote IP address:
ifaddr src_addr dst_addr
ifaddr src_addr dst_addr
.LP
Where, src_addr is the IP address that my side is willing to use, and
dst_addr is the IP address which his side should use.
Where, src_addr is the IP address that the local side is willing to use and
dst_addr is the IP address which the remote side should use.
.LP
ifaddr 192.244.177.38 192.244.177.2
For example, above specification means
For example, the above specification means:
o I strongly want to use 192.244.177.38 as my side. I'll disagree when
peer suggest me to use other addresses.
o I strongly want to use 192.244.177.38 as my side. I'll disagree if the
peer suggests that I use another address.
o I strongly insists peer to use 192.244.177.2 as his side address. I
don't permit him to use any IP address but 192.244.177.2. When peer
request other IP address, I always suggest him to use 192.244.177.2.
o I strongly insist that peer use 192.244.177.2 as own side address and
don't permit it to use any IP address but 192.244.177.2. When peer
request another IP address, I always suggest that it use 192.244.177.2.
o This is all right, when each side has pre-determined IP address.
However, it is often the case one side is acting as a server which
controls IP address and the other side should obey the direction from
him. In order to allow more flexible behavior, `ifaddr' command
allows user to specify IP address more loosely.
o This is all fine when each side has a pre-determined IP address,
however it is often the case that one side is acting as a server which
controls all IP addresses and the other side should obey the direction from
it. In order to allow more flexible behavior, `ifaddr' command
allows the user to specify IP address more loosely:
ifaddr 192.244.177.38/24 192.244.177.2/20
Number followed by slash (/) represents number of bits significant in
IP address. That is, this example means
Number followed by slash (/) represent the number of bits significant in
teh IP address. That is, the above example signifies that:
o I'd like to use 192.244.177.38 as my side address, if it is
possible. But I also accept any IP address between 192.244.177.0 and
192.244.177.255.
o I'd like to use 192.244.177.38 as my address if it is possible, but
I'll also accept any IP address between 192.244.177.0 and 192.244.177.255.
o I'd like to make him to use 192.244.177.2 as his side address. But
I also permit him to use any IP address between 192.244.176.0 and
o I'd like to make him use 192.244.177.2 as his own address, but
I'll also permit him to use any IP address between 192.244.176.0 and
192.244.191.255.
o As you may have already noticed, 192.244.177.2 is equivalent to say
o As you may have already noticed, 192.244.177.2 is equivalent to saying
192.244.177.2/32.
o As an exception, 0 is equivalent to 0.0.0.0/0. Means, I have no idea
about IP address and obey what he says.
o As an exception, 0 is equivalent to 0.0.0.0/0, meaning that I have no preferred
IP address and will obey the remote peer's selection.
o 192.244.177.2/0 means that I'll accept/permit any IP address but
I'll try to insist to use 192.244.177.2 at first.
I'll try to insist that 192.244.177.2 be used first.
.SH Connecting with service provider
.SH Connecting with your service provider
.LP
1) Describe provider's phone number in DialScript. Use ``set dial'' or
``set phone'' command.
1) Describe provider's phone number in DialScript: Use the ``set dial'' or
``set phone'' commands.
2) Describle login procedure in LoginScript. Use ``set login'' command.
2) Describe login procedure in LoginScript: Use the ``set login'' command.
.TP
3) Use ``set ifaddr'' command to define IP address.
3) Use ``set ifaddr'' command to define the IP address.
o If you know what IP address provider uses, then use it as his address.
o If you know what IP address provider uses, then use it as the remote address.
o If provider has assigned particular IP address for you, then use it
as my address.
o If provider has assigned a particular IP address to you, then use it
as your address.
o If provider assigns your address dynamically, use 0 as my address.
o If provider assigns your address dynamically, use 0 as your address.
o If you have no info on IP addresses, then try
o If you have no idea which IP addresses to use, then try
set ifaddr 0 0
.TP 2
4) If provider request you to use PAP/CHAP auth method,
add next lines into your ppp.conf.
4) If provider requests that you use PAP/CHAP authentication methods,
add the next lines to your ppp.conf file:
.TP 3
.B enable pap (or enable chap)
@ -487,15 +495,14 @@ add next lines into your ppp.conf.
.TP 3
.LP
Please refer /etc/ppp/ppp.conf.iij for some real examples.
Please refer to /etc/ppp/ppp.conf.iij for some real examples.
.LP
.SH Logging facility
.LP
\fI\fIPPP\fR\fR is able to generate following level log info as
/var/log/ppp.log
\fI\fIPPP\fR\fR is able to generate the following log info into
/var/log/ppp.log:
.TP
.B Phase
@ -520,15 +527,15 @@ Dump HDLC packet in hex
Dump async level packet in hex
.LP
``set debug'' command allows you to set logging output level, and
multiple levels can be specified. Default is equivalent to ``set
``set debug'' command allows you to set logging output level, of which
multiple levels can be specified. The default is equivalent to ``set
debug phase lcp''.
.SH For more details
.SH MORE DETAILS
.TP 2
o Please read Japanese doc for complete explanation.
Well, it is not useful for non-japanese readers,
o Please read the Japanese doc for complete explanation.
It may not be useful for non-japanese readers,
but examples in the document may help you to guess.
.TP 2
@ -537,23 +544,23 @@ Please read example configuration files.
.TP 2
o
Use ``help'', ``show ?'' and ``set ?'' command.
Use ``help'', ``show ?'' and ``set ?'' commands.
.TP 2
o NetBSD and BSDI-1.0 has been supported in previous release, but no
longer supported in this release. Please contact to author if you
o NetBSD and BSDI-1.0 were supported in previous releases but are no
longer supported in this release. Please contact the author if you
need old driver code.
.SH FILES
.LP
\fIPPP\fR may refers three files, ppp.conf, ppp.linkup and ppp.secret.
These files are placed in /etc/ppp, but user can create his own files
under HOME directory as .ppp.conf,.ppp.linkup and .ppp.secret.the ppp
always try to consult to user's personal setup first.
\fIPPP\fR may refer to three files: ppp.conf, ppp.linkup and ppp.secret.
These files are placed in /etc/ppp, but the user can create his own files
under his HOME directory as .ppp.conf,.ppp.linkup and .ppp.secret.
\fIPPP\fR will always try to consult the user's personal setup first.
.TP
.B $HOME/ppp/.ppp.[conf|linkup|secret]
User depend configuration files.
User dependant configuration files.
.TP
.B /etc/ppp/ppp.conf
@ -561,36 +568,27 @@ System default configuration file.
.TP
.B /etc/ppp/ppp.secret
A authorization file for each system.
An authorization file for each system.
.TP
.B /etc/ppp/ppp.linkup
A checking file when
A file to check when
.I ppp
establishes network level connection.
establishes a network level connection.
.TP
.B /var/log/ppp.log
Logging and debug information file.
Logging and debugging information file.
.TP
.B /var/spool/lock/Lck..*
tty port locking file.
.SH BUGS
If you try to connect to Network Provider, you should consider enough
both my and his IP address. They may assign both/one of address
dynamically when ppp is connected. The IP address which you did set up
is just assumption when you set up ppp as dial-on-demand mode (-auto)
that is required them before connecting. So just trigger packet in
dial-on-demand will be lost.
.SH HISTORY
This programm has deliverd into core since FreeBSD-2.1 by Atsushi
This program was submitted to the FreeBSD core team for FreeBSD-2.0.5 by Atsushi
Murai (amurai@spec.co.jp).
.SH AUTHORS
Toshiharu OHNO (tony-o@iij.ad.jp)
Jordan Hubbard (jkh@freebsd.org) - significantly edited this document.

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@ -1,5 +1,5 @@
.\" manual page [] for ppp 0.94 beta2 + alpha
.\" $Id: ppp.8,v 1.4 1995/03/12 12:03:48 amurai Exp $
.\" $Id: ppp.8,v 1.5 1995/05/21 10:52:05 jkh Exp $
.\" SH section heading
.\" SS subsection heading
.\" LP paragraph
@ -17,56 +17,55 @@ ppp \- Point to Point Protocol (aka iijppp)
]
.SH DESCRIPTION
.LP
This is user process \fIPPP\fR software package. Normally, \fIPPP\fR
is implemented as a part of kernel and hard to debug and/or modify its
behavior. (i.e. pppd) However, in this implementation, \fIPPP\fR is
implemented as a user process with the help of tunnel device driver.
This is a user process \fIPPP\fR software package. Normally, \fIPPP\fR
is implemented as a part of the kernel (e.g. pppd) and it's thus somewhat
hard to debug and/or modify its behavior. However, in this implementation
\fIPPP\fR is done as a user process with the help of the tunnel device driver.
.LP
.SH Major Features
.TP
o Provide interactive user interface.
Using its command mode, user can
easily enter commands to establish the connection with the peer, check
the status of connection, and close the connection. And now, all
functions has password protected if describe your hostname/password in
secret file or exist secret file itself.
o Provides interactive user interface.
Using its command mode, the user can
easily enter commands to establish the connection with the remote end, check
the status of connection, and close the connection. All functions can
also be optionally password protected for security.
.TP
o Supports both of manual and automatic dialing.
Interactive mode has ``term'' command which enables you to talk to your modem
directory. When your modem is connected to the peer, and it starts to
speak \fIPPP\fR, \fIPPP\fR software detects it and turns into packet
mode automatically. Once you have convinced how to connect with the
peer, you can write chat script to define necessary dialing and login
procedure for later convenience.
o Supports both manual and automatic dialing.
Interactive mode has a ``term'' command which enables you to talk to your modem
directly. When your modem is connected to the remote peer and it starts to
talk \fIPPP\fR, the \fIPPP\fR software detects it and switches to packet
mode automatically. Once you have determined the proper sequence for connecting
with the remote host, you can write a chat script to define the necessary dialing
and login procedure for later convenience.
.TP
o Supports on-demand dialup capability.
By using auto mode, \fIPPP\fR
program will act as a daemon and wait for the packet send to the peer.
Once packet is found, daemon automatically dials and establish the
By using auto mode, the \fIPPP\fR
program will act as a daemon and wait for a packet to be sent over the \fIPPP\fR
link. When this happens, the daemon automatically dials and establishes the
connection.
.TP
o Supports server mode by direct mode.
Can act as server which accept incoming \fIPPP\fR connection.
o Supports server-side \fIPPP\fR connections.
Can act as server which accepts incoming \fIPPP\fR connections.
.TP
o Supports PAP and CHAP authentification.
o Supports PAP and CHAP authentication.
.TP
o Supports Proxy Arp.
\fIPPP\fR is set up as server, you can also set up doing a proxy arp
When \fIPPP\fR is set up as server, you can also configure it to do proxy arp
for your connection.
.TP
o Supports packet filtering.
User can define four kinds of filters;
ifilter for incoming packet, ofilter for outgoing packet, dfilter to
define dialing trigger packet and afilter to keep alive a connection
by trigger packet.
User can define four kinds of filters:
ifilter for incoming packets, ofilter for outgoing packets, dfilter to
define dialing trigger packet and afilter to keep a connection alive with
the trigger packet.
.TP
o Tunnel driver supports bpf.
@ -77,53 +76,60 @@ o Supports \fIPPP\fR over TCP capability.
.TP
o Supports IETF draft Predictor-1 compression.
\fIPPP\fR has a not only a VJ-compress but also Predictor-1
commpression. Normally a modem has a compression (i.e. v42.bis) and
system should accept a high speed/expand date from modem. The
Predictor-1 compression will compress whole packet data by system not
like a VJ-compress. So it will reduce system overhead by SIO's
interruption because of reducing data traffic between modem and SIO.
\fIPPP\fR supports not only VJ-compression but also Predictor-1
compression. Normally, a modem has built-in compression (e.g. v42.bis)
and the system may receive higher data rates from it as a result of
such compression. While this is generally a good thing in most
other situations, this higher speed data imposes a penalty on
the system by increasing the number of serial interrupts the system
has to process in talking to the modem. Unlike VJ-compression,
Predictor-1 compression pre-compresses \fBall\fR data flowing through
the link and thus reduces traffic to a minimum.
.TP
o Runs under BSDI-1.1 and FreeBSD-1.1.
o Runs under BSDI-1.1 and FreeBSD.
Patch for NeXTSTEP 3.2 is also available on the net.
.SH GETTING STARTED
.LP
When you run \fIPPP\fR, you might need to check and setup
configuration. First your kernel should include a tunnel
device. if not, you should re-config your kernel and re-
build including follows line.
When you first run \fIPPP\fR, you may need to deal with some
initial configuration details. First, your kernel should
include a tunnel device (the default in FreeBSD 2.0.5 and later).
If it doesn't, you'll need to rebuild your kernel with the following
line in your kernel configuration file:
.TP
pseudo-device tun 1
.LP
Last word indicates a number of tunnel device as equivalent
for number of \fIPPP\fR connection.
You should set the numeric field to the maximum number of
\fIPPP\fR connections you wish to support.
.LP
Second, check special(device) file for tunnel device named as
/dev/tun0. If not, you can create by type "MAKEDEV tun0"
Second, check your /dev directory for the tunnel device entry
/dev/tun0. If it doesn't exist, you can create it by running
"MAKEDEV tun0"
.SH MANUAL DIALING
.LP
% ppp
User Process PPP written by Toshiharu OHNO.
-- If you write your hostname and password in ppp.secret, you can't do anything except quit and help command --
-- If you set your hostname and password in /etc/ppp/ppp.secret, you can't do
anything except run the quit and help commands --
ppp on "your hostname"> help
passwd : Password for manupilation
quit : Quit PPP program
passwd : Password for security
quit : Quit the PPP program
help : Display this message
ppp on tama> pass <password>
-- "on" change to "ON" if you type correct password.
-- "on" will change to "ON" if you specify the correct password.
ppp ON tama>
-- You can specify modem and device name using following commands.
-- You can specify the device name and speed for your modem using
the following commands:
ppp ON tama> set line /dev/cuaa0
@ -148,15 +154,15 @@ ppp ON tama> term
-- PPP started in remote side ---
-- When peer start to speak PPP, the program will detect it
-- automatically and back to command mode.
-- When the peer start to talk PPP, the program will detect it
-- automatically and return to command mode.
ppp ON tama>
\fBPPP\fR ON TAMA>
-- NOW, you are get connected !! Note that prompt has changed to
-- capital letters
-- NOW, you are connected! Note that prompt has changed to
-- capital letters to indicate this.
PPP ON tama> show lcp
@ -165,12 +171,12 @@ PPP ON tama> show lcp
PPP ON tama> show ipcp
-- You'll see IPCP status --
-- At this point, your machine has host route to the peer.
-- If your want to add default route entry, then enter
-- At this point, your machine has a host route to the peer.
-- If you want to add a default route entry, then enter
PPP ON tama> add 0 0 HISADDR
-- Here string `HISADDR' represents IP address of connected peer.
-- Here string `HISADDR' represents the IP address of connected peer.
PPP ON tama>
@ -182,7 +188,7 @@ PPP ON tama> show log
PPP ON tama> close
-- Connection is closed, and modem will be hanged.
-- Connection is closed and modem will be disconnected.
ppp ON tama> quit
@ -192,9 +198,9 @@ ppp ON tama> quit
.SH AUTOMATIC DIALING
.LP
To use automatic dialing, you must prepare Dial and Login chat script.
See example definition found in ppp.conf.sample (Format of ppp.conf is
pretty simple.)
To use automatic dialing, you must prepare some Dial and Login chat scripts.
See the example definitions in /etc/ppp/ppp.conf.sample (the format of ppp.conf is
pretty simple).
.TP 2
o
@ -202,23 +208,22 @@ Each line contains one command, label or comment.
.TP 2
o
Line stating with # is treated as a comment line.
A line starting with a `#' character is treated as a comment line.
.TP 2
o
Label name has to start from first column and should be followed by colon (:).
A label name has to start in the first column and should be followed by a colon (:).
.TP 2
o
Command line must contains space or tab at first column.
A command line must contain a space or tab in the first column.
.LP
If ppp.conf is ready, specify destination label name when you invoke
ppp. Commands associated with destination label is executed when ppp
command is invoked. Note that commands associated with ``default''
label is ALWAYS executed.
Once ppp.conf is ready, specify the destination label name when you invoke
ppp. Commands associated with the destination label are then executed.
Note that the commands associated with the ``default'' label are ALWAYS executed.
Once connection is made, you'll find that prompt is changed to
Once the connection is made, you'll find that prompt has changed to
capital \fIPPP\fR on tama>.
@ -229,18 +234,18 @@ Once connection is made, you'll find that prompt is changed to
login OK!
PPP ON tama>
If ppp.linkup file is available, its contents are executed when
\fIPPP\fR link is connected. See example which add default route.
The string HISADDR matches with IP address of connected peer.
If an /etc/ppp/ppp.linkup file is available, its contents are executed when
the \fIPPP\fR connection is established. See the provided example which adds
a default route. The string HISADDR represents the IP address of the remote peer.
.SH DAIL ON DEMAND
.SH DIAL ON DEMAND
.LP
To play with demand dialing, you must use -auto option. Also, you
must specify destination label with proper setup in ppp.conf. It must
contain ``ifaddr'' command to define peer's IP address. (refer
/etc/ppp/ppp.conf.sample)
To play with demand dialing, you must use the -auto option. You
must also specify the destination label in /etc/ppp/ppp.conf to use.
It should contain the ``ifaddr'' command to define the remote
peer's IP address. (refer to /etc/ppp/ppp.conf.sample)
% ppp -auto pm2demand
@ -248,8 +253,9 @@ contain ``ifaddr'' command to define peer's IP address. (refer
%
.LP
When -auto is specified, \fIPPP\fR program works as a daemon. But,
you are still able to use command features to check its behavior.
When -auto is specified, \fIPPP\fR program runs as a daemon but
you can still configure or examine its configuration by using
the diagnostic port as follows:
% telnet localhost 3000
@ -267,52 +273,53 @@ you are still able to use command features to check its behavior.
....
.LP
Each ppp has associated port number, which is computed as "3000 +
tunnel_device_number". If 3000 is not good base number, edit defs.h.
When packet toward to remote network is detected, \fIPPP\fR will take
dialing action and try to connect with the peer. If dialing is failed,
program will wait for 30 seconds. Once this hold time expired, It's
re-dialing with previous trigger packets.
Each ppp daemon has an associated port number which is computed as "3000 +
tunnel_device_number". If 3000 is not good base number, edit defs.h in
the ppp sources (/usr/src/usr.sbin/ppp) and recompile it.
When an outgoing packet is detected, \fIPPP\fR will perform the
dialing action (chat script) and try to connect with the peer. If dialing fails,
it will wait for 30 seconds and retry.
To terminate program, type
To terminate the program, type
PPP ON tama> close
\fBppp\fR ON tama> quit all
.LP
Simple ``quit'' command will terminates telnet connection, but
\fIPPP\fR program itself is not terminated. You must use ``quit all''
to terminate the program running as daemon.
A simple ``quit'' command will terminate the telnet connection but
not the \fIPPP\fR program itself. You must use ``quit all'' to terminate
the \fRPPP\fR program as well.
.LP
.SH PACKET FILTERING
.LP
This implementation supports packet filtering. There are three filters; ifilter, ofilter and dfilter. Here's some basics.
This implementation supports packet filtering. There are three kinds of filters:
ifilter, ofilter and dfilter. Here are the basics:
.LP
.TP
o Filter definition has next syntax.
o A filter definition has the following syntax:
set filter-name rule-no action [src_addr/src_width] [dst_addr/dst_width]
[proto [src [lt|eq|gt] port ] [dst [lt|eq|gt] port] [estab]
a) filter-name should be ifilter, ofilter or dfiler.
b) There are two actions permit and deny. If given packet is matched
against the rule, action is taken immediately.
b) There are two actions: permit and deny. If a given packet is matched
against the rule, the associated action is taken immediately.
c) src_width and dst_width works like a netmask to represent address range.
c) src_width and dst_width works like a netmask to represent an address range.
d) proto must be one of icmp, udp or tcp.
.TP
o Each filter can hold upto 20 rules.
Rule number starts from 0. Entire rule set is not effective until rule 0 is defined.
o Each filter can hold up to 20 rules, starting from rule 0.
The entire rule set is not effective until rule 0 is defined.
.TP 2
o
If no rule is matched with a packet, that packet will be discarded (blocked).
If no rule is matched to a packet, that packet will be discarded (blocked).
.TP
o Use ``set filer-name -1'' to flush all rules.
@ -321,160 +328,161 @@ o Use ``set filer-name -1'' to flush all rules.
See /etc/ppp/ppp.conf.filter.example
.LP
.SH RECEIVE INCOMING PPP CONNECTION
.SH RECEIVING INCOMING PPP CONNECTIONS
.LP
To receive incoming \fIPPP\fR connection request, follow next steps.
To handle an incoming \fIPPP\fR connection request, follow these steps:
.LP
a) Make sure modem and /etc/rc.serial is setting up correctly.
- Use HardWare Handshake (CTS/RTS) for flow controlling.
- Modem should be setup NO echo back (ATE0) and
No results string (ATQ1)
a) Make sure the modem and (optionally) /etc/rc.serial is configured correctly.
- Use Hardware Handshake (CTS/RTS) for flow control.
- Modem should be set to NO echo back (ATE0) and NO results string (ATQ1)
b) Edit /etc/ttys to enable getty on the port where modem is attached.
b) Edit /etc/ttys to enable a getty on the port where the modem is attached.
For example:
ttyd1 "/usr/libexec/getty std.38400" dialup on secure
Don't forget to send HUP signal to init process.
Don't forget to send a HUP signal to the init process to start the getty.
# kill -HUP 1
c) Prepare account for incoming user.
c) Prepare an account for the incoming user.
ppp:xxxx:66:66:PPP Login User:/home/ppp:/usr/local/bin/ppplogin
d) Create /usr/local/bin/ppplogin file with next contents.
d) Create a /usr/local/bin/ppplogin file with the following contents:
#!/bin/sh
/usr/sbin/ppp -direct
You can specify label name for further control.
You can specify a label name for further control.
.LP
Direct mode (-direct) lets \fIPPP\fR to work with standard in and
out. Again, you can telnet to 3000 to get command mode control.
Direct mode (-direct) lets \fIPPP\fR work with stdin and stdout.
You can also telnet to 3000 to get command mode control, as with
client-side \fIPPP\fR.
.LP
.SH SETTING IDLE TIMER
.LP
To check/set idletimer, use ``show timeout'' and ``set timeout'' command.
To check/set idletimer, use the ``show timeout'' and ``set timeout'' commands.
.LP
Ex. ppp ON tama> set timeout 600
.LP
Timeout period is measured in secs and default value is 180 or 3 min. To disable idle timer function, use ``set timeout 0''.
The timeout period is measured in seconds, the default value for which is 180 or 3 min.
To disable the idle timer function, ``set timeout 0''.
.LP
.LP
In -auto mode, idle timeout cause \fIPPP\fR session closed. However,
\fIPPP\fR program itself is keep running. Another trigger packet cause
dialing action.
In -auto mode, an idle timeout causes the \fIPPP\fR session to be closed, though
the \fIPPP\fR program itself remains running. Another trigger packet will cause it
to attempt to reestablish the link.
.LP
.SH Predictor-1 compression
.LP
This version supports CCP and Predictor type 1 compression based on
current IETF-draft specs. As a default behavior, \fIPPP\fR will
propose to use (or willing to accept) this capability and use it if
peer agrees (or requests).
the current IETF-draft specs. As a default behavior, \fIPPP\fR will
attempt to use (or be willing to accept) this capability when the
peer agrees (or requests it).
.LP
.LP
To disable CCP/predictor function completely, use ``disable pred''
and ``deny pred'' command.
To disable CCP/predictor functionality completely, use the ``disable pred''
and ``deny pred'' commands.
.LP
.SH Controlling IP address
.LP
\fIPPP\fR uses IPCP to negotiate IP addresses. Each side of node
informs IP address that willing to use to the peer, and if requested
IP address is acceptable, \fIPPP\fR returns ACK to
requester. Otherwise, \fIPPP\fR returns NAK to suggest the peer to use
different IP address. When both side of nodes agrees to accept the
received request (and send ACK), IPCP is reached to open state and
network level connection is established.
\fIPPP\fR uses IPCP to negotiate IP addresses. Each side of the connection
specifies the IP address that it's willing to use, and if the requested
IP address is acceptable then \fIPPP\fR returns ACK to the requester.
Otherwise, \fIPPP\fR returns NAK to suggest that the peer use a
different IP address. When both sides of the connection agree to accept the
received request (and send ACK), IPCP is set to the open state and
a network level connection is established.
.LP
To control, this IPCP behavior, this implementation has ``set
ifaddr'' to define MY and HIS IP address.
To control this IPCP behavior, this implementation has the ``set ifaddr'' command
for defining the local and remote IP address:
ifaddr src_addr dst_addr
ifaddr src_addr dst_addr
.LP
Where, src_addr is the IP address that my side is willing to use, and
dst_addr is the IP address which his side should use.
Where, src_addr is the IP address that the local side is willing to use and
dst_addr is the IP address which the remote side should use.
.LP
ifaddr 192.244.177.38 192.244.177.2
For example, above specification means
For example, the above specification means:
o I strongly want to use 192.244.177.38 as my side. I'll disagree when
peer suggest me to use other addresses.
o I strongly want to use 192.244.177.38 as my side. I'll disagree if the
peer suggests that I use another address.
o I strongly insists peer to use 192.244.177.2 as his side address. I
don't permit him to use any IP address but 192.244.177.2. When peer
request other IP address, I always suggest him to use 192.244.177.2.
o I strongly insist that peer use 192.244.177.2 as own side address and
don't permit it to use any IP address but 192.244.177.2. When peer
request another IP address, I always suggest that it use 192.244.177.2.
o This is all right, when each side has pre-determined IP address.
However, it is often the case one side is acting as a server which
controls IP address and the other side should obey the direction from
him. In order to allow more flexible behavior, `ifaddr' command
allows user to specify IP address more loosely.
o This is all fine when each side has a pre-determined IP address,
however it is often the case that one side is acting as a server which
controls all IP addresses and the other side should obey the direction from
it. In order to allow more flexible behavior, `ifaddr' command
allows the user to specify IP address more loosely:
ifaddr 192.244.177.38/24 192.244.177.2/20
Number followed by slash (/) represents number of bits significant in
IP address. That is, this example means
Number followed by slash (/) represent the number of bits significant in
teh IP address. That is, the above example signifies that:
o I'd like to use 192.244.177.38 as my side address, if it is
possible. But I also accept any IP address between 192.244.177.0 and
192.244.177.255.
o I'd like to use 192.244.177.38 as my address if it is possible, but
I'll also accept any IP address between 192.244.177.0 and 192.244.177.255.
o I'd like to make him to use 192.244.177.2 as his side address. But
I also permit him to use any IP address between 192.244.176.0 and
o I'd like to make him use 192.244.177.2 as his own address, but
I'll also permit him to use any IP address between 192.244.176.0 and
192.244.191.255.
o As you may have already noticed, 192.244.177.2 is equivalent to say
o As you may have already noticed, 192.244.177.2 is equivalent to saying
192.244.177.2/32.
o As an exception, 0 is equivalent to 0.0.0.0/0. Means, I have no idea
about IP address and obey what he says.
o As an exception, 0 is equivalent to 0.0.0.0/0, meaning that I have no preferred
IP address and will obey the remote peer's selection.
o 192.244.177.2/0 means that I'll accept/permit any IP address but
I'll try to insist to use 192.244.177.2 at first.
I'll try to insist that 192.244.177.2 be used first.
.SH Connecting with service provider
.SH Connecting with your service provider
.LP
1) Describe provider's phone number in DialScript. Use ``set dial'' or
``set phone'' command.
1) Describe provider's phone number in DialScript: Use the ``set dial'' or
``set phone'' commands.
2) Describle login procedure in LoginScript. Use ``set login'' command.
2) Describe login procedure in LoginScript: Use the ``set login'' command.
.TP
3) Use ``set ifaddr'' command to define IP address.
3) Use ``set ifaddr'' command to define the IP address.
o If you know what IP address provider uses, then use it as his address.
o If you know what IP address provider uses, then use it as the remote address.
o If provider has assigned particular IP address for you, then use it
as my address.
o If provider has assigned a particular IP address to you, then use it
as your address.
o If provider assigns your address dynamically, use 0 as my address.
o If provider assigns your address dynamically, use 0 as your address.
o If you have no info on IP addresses, then try
o If you have no idea which IP addresses to use, then try
set ifaddr 0 0
.TP 2
4) If provider request you to use PAP/CHAP auth method,
add next lines into your ppp.conf.
4) If provider requests that you use PAP/CHAP authentication methods,
add the next lines to your ppp.conf file:
.TP 3
.B enable pap (or enable chap)
@ -487,15 +495,14 @@ add next lines into your ppp.conf.
.TP 3
.LP
Please refer /etc/ppp/ppp.conf.iij for some real examples.
Please refer to /etc/ppp/ppp.conf.iij for some real examples.
.LP
.SH Logging facility
.LP
\fI\fIPPP\fR\fR is able to generate following level log info as
/var/log/ppp.log
\fI\fIPPP\fR\fR is able to generate the following log info into
/var/log/ppp.log:
.TP
.B Phase
@ -520,15 +527,15 @@ Dump HDLC packet in hex
Dump async level packet in hex
.LP
``set debug'' command allows you to set logging output level, and
multiple levels can be specified. Default is equivalent to ``set
``set debug'' command allows you to set logging output level, of which
multiple levels can be specified. The default is equivalent to ``set
debug phase lcp''.
.SH For more details
.SH MORE DETAILS
.TP 2
o Please read Japanese doc for complete explanation.
Well, it is not useful for non-japanese readers,
o Please read the Japanese doc for complete explanation.
It may not be useful for non-japanese readers,
but examples in the document may help you to guess.
.TP 2
@ -537,23 +544,23 @@ Please read example configuration files.
.TP 2
o
Use ``help'', ``show ?'' and ``set ?'' command.
Use ``help'', ``show ?'' and ``set ?'' commands.
.TP 2
o NetBSD and BSDI-1.0 has been supported in previous release, but no
longer supported in this release. Please contact to author if you
o NetBSD and BSDI-1.0 were supported in previous releases but are no
longer supported in this release. Please contact the author if you
need old driver code.
.SH FILES
.LP
\fIPPP\fR may refers three files, ppp.conf, ppp.linkup and ppp.secret.
These files are placed in /etc/ppp, but user can create his own files
under HOME directory as .ppp.conf,.ppp.linkup and .ppp.secret.the ppp
always try to consult to user's personal setup first.
\fIPPP\fR may refer to three files: ppp.conf, ppp.linkup and ppp.secret.
These files are placed in /etc/ppp, but the user can create his own files
under his HOME directory as .ppp.conf,.ppp.linkup and .ppp.secret.
\fIPPP\fR will always try to consult the user's personal setup first.
.TP
.B $HOME/ppp/.ppp.[conf|linkup|secret]
User depend configuration files.
User dependant configuration files.
.TP
.B /etc/ppp/ppp.conf
@ -561,36 +568,27 @@ System default configuration file.
.TP
.B /etc/ppp/ppp.secret
A authorization file for each system.
An authorization file for each system.
.TP
.B /etc/ppp/ppp.linkup
A checking file when
A file to check when
.I ppp
establishes network level connection.
establishes a network level connection.
.TP
.B /var/log/ppp.log
Logging and debug information file.
Logging and debugging information file.
.TP
.B /var/spool/lock/Lck..*
tty port locking file.
.SH BUGS
If you try to connect to Network Provider, you should consider enough
both my and his IP address. They may assign both/one of address
dynamically when ppp is connected. The IP address which you did set up
is just assumption when you set up ppp as dial-on-demand mode (-auto)
that is required them before connecting. So just trigger packet in
dial-on-demand will be lost.
.SH HISTORY
This programm has deliverd into core since FreeBSD-2.1 by Atsushi
This program was submitted to the FreeBSD core team for FreeBSD-2.0.5 by Atsushi
Murai (amurai@spec.co.jp).
.SH AUTHORS
Toshiharu OHNO (tony-o@iij.ad.jp)
Jordan Hubbard (jkh@freebsd.org) - significantly edited this document.