195 lines
6.7 KiB
Plaintext
195 lines
6.7 KiB
Plaintext
# $FreeBSD$
|
|
|
|
# This advanced ppp configuration file explains how to implement
|
|
# the following:
|
|
#
|
|
# ------------- ------------- -------------
|
|
# | host1 | | host2 | | host3 |
|
|
# ------------- ------------- -------------
|
|
# | | |
|
|
# |---------------------- LAN ----------------------|
|
|
# |
|
|
# -------------
|
|
# | Gateway |
|
|
# -------------
|
|
# |
|
|
# -----------------------------------
|
|
# | | | |
|
|
# isp1 isp2 isp3 ispN
|
|
# | | | |
|
|
# -----------------------------------
|
|
# |
|
|
# ------------
|
|
# | Receiver |
|
|
# ------------
|
|
# |
|
|
# Internet
|
|
#
|
|
# The connection is implemented so that any ISP connection can go down
|
|
# without loss of connectivity between the LAN and the Internet. It is
|
|
# of course also possible to shut down any link manually.
|
|
#
|
|
# There is a working example in ppp.*.span-isp.working that can be tested
|
|
# on a single machine !
|
|
#
|
|
#
|
|
# Prerequisites:
|
|
#
|
|
# o The Receiver machine must be in the outside world and must be willing
|
|
# to accept a multilink ppp connection over UDP, assigning a routable IP
|
|
# number to the Gateway machine. This probably means that it must be
|
|
# a *BSD box as I know of no other ppp implementations that can use UDP
|
|
# as a transport.
|
|
#
|
|
# o The Receiver machine must be multi-homed with at least N+1 addresses
|
|
# where N is the maximun number of ISPs that you wish to use
|
|
# simultaneously. We assume the IP numbers to be RIP1, RIP2 ... RIPN.
|
|
# REAL-LOCAL-IP is the real IP number of the Receiver machine (and must
|
|
# not be the same as any of the RIP* numbers).
|
|
#
|
|
# o Both the Gateway and the Receiver machines must have several tun
|
|
# interfaces configured into the kernel (see below).
|
|
#
|
|
# o Both the Gateway and the Receiver machines must have the following
|
|
# entry in /etc/services:
|
|
#
|
|
# ppp 6671/udp
|
|
#
|
|
# The port number isn't important, but it must be consistent across
|
|
# machines.
|
|
#
|
|
# o The Receiver machine must have the following entry in
|
|
# /etc/inetd.conf:
|
|
#
|
|
# ppp dgram udp wait root /usr/sbin/ppp ppp -direct vpn-in
|
|
#
|
|
# Note: Because inetd ``wait''s for ppp to finish, a single ppp
|
|
# invocation receives all incoming packets. This creates
|
|
# havoc with LQR magic number checks, so LQR *must not* be
|
|
# enabled.
|
|
# Also, -direct invocations of ppp do sendto()s using the
|
|
# address that was last recvfrom()d. This means that the
|
|
# returning traffic is a bit unbalanced. Perhaps ppp should
|
|
# be smart enough to automatically clone an existing link
|
|
# when it detects a new incoming address.... tricky !
|
|
#
|
|
# If you use ppp to connect to your ISPs, the isp* profiles shold be used,
|
|
# resulting in the vpn* profiles being called from ppp.linkup.span-isp.
|
|
# These invocations will bond together into a MP ppp invocation.
|
|
#
|
|
# If the link to your ISP is via another type of interface (cable modem
|
|
# etc), simply configure the interface with a netmask of 0xffffffff and
|
|
# add a route to RIPN via the interface address (no default). You can
|
|
# then start ppp using the vpn-nic label.
|
|
#
|
|
# The Receiver machine should have N tun interfaces (where N is the maximum
|
|
# number of ISPs that you wish to use simultaneously). The Gateway machine
|
|
# requires N interfaces plus an additional N interfaces (total 2 * N) if
|
|
# you're using ppp to talk to the ISPs.
|
|
|
|
# Using ppp to connect to your ISPs (PPP over UDP over PPP):
|
|
#
|
|
# When we connect to our ISPs using ppp, we start the MP ppp invocation
|
|
# from ppp.linkup (see ppp.linkup.span-isp) for each link. We also remove
|
|
# the link from ppp.linkdown (see ppp.linkdown.span-isp). This is necessary
|
|
# because relying on our LQR strategy (dropping the link after 5 missing
|
|
# replies) is just too slow to be practical in this environment.
|
|
#
|
|
# This works because the MP invocations are smart enough to recognise that
|
|
# another process is already running and to pass the link over to that
|
|
# running version.
|
|
#
|
|
# Only the ISP links should be started manually. When they come up, they'll
|
|
# start the MP invocation.
|
|
|
|
default:
|
|
set speed 115200
|
|
set device /dev/cuad0 /dev/cuad1 /dev/cuad2 /dev/cuad3
|
|
set dial "ABORT BUSY ABORT NO\\sCARRIER ABORT NO\\sDIAL\\sTONE TIMEOUT 4 \
|
|
\"\" ATZ OK-ATZ-OK ATDT\\T TIMEOUT 60 CONNECT \\c \\n"
|
|
set login
|
|
set redial 3 5
|
|
set timeout 0
|
|
enable lqr echo
|
|
set lqrperiod 15
|
|
|
|
isp1:
|
|
set phone "1234567"
|
|
set authname "isp1name"
|
|
set authkey "isp1key"
|
|
add! RIP1/32 HISADDR
|
|
|
|
isp2:
|
|
set phone "2345678"
|
|
set authname "isp2name"
|
|
set authkey "isp2key"
|
|
add! RIP2/32 HISADDR
|
|
|
|
ispN:
|
|
set phone "3456789"
|
|
set authname "ispNname"
|
|
set authkey "ispNkey"
|
|
add! RIPN/32 HISADDR
|
|
|
|
|
|
# Our MP version of ppp. vpn is a generic label used by each of the
|
|
# other vpn invocations by envoking ppp with both labels (see
|
|
# ppp.linkup.span-isp).
|
|
# Each ``set device'' command tells ppp to use UDP packets destined for
|
|
# the given IP/port as the link (transport). The routing table will
|
|
# ensure that these UDP packets use the correct ISP connection.
|
|
|
|
vpn:
|
|
set enddisc LABEL
|
|
set speed sync
|
|
set mrru 1500
|
|
set mru 1504 # Room for the MP header
|
|
nat enable yes
|
|
set authname "vpnname"
|
|
set authkey "vpnkey"
|
|
add! default HISADDR
|
|
disable deflate pred1 lqr
|
|
deny deflate pred1
|
|
|
|
vpn1:
|
|
rename 1
|
|
set device RIP1:ppp/udp
|
|
|
|
vpn2:
|
|
rename 2
|
|
set device RIP2:ppp/udp
|
|
|
|
vpnN:
|
|
rename N
|
|
set device RIPN:ppp/udp
|
|
|
|
vpn-nic:
|
|
load vpn
|
|
clone 1 2 N
|
|
link deflink rm
|
|
link 1 set device RIP1:ppp/udp
|
|
link 2 set device RIP2:ppp/udp
|
|
link N set device RIPN:ppp/udp
|
|
|
|
# The Receiver profile is a bit more straight forward, as it doesn't need
|
|
# to get bogged down with sublinks. Replace REAL-ASSIGNED-IP with the
|
|
# IP number to be assigned to the Gateway machine. Replace REAL-LOCAL-IP
|
|
# with the real IP number of the Receiver machine.
|
|
#
|
|
# No other entries are required on the Receiver machine, and this entry
|
|
# is not required on the Gateway machine. The Receiver machine also
|
|
# requires the contents of ppp.secret.span-isp.
|
|
#
|
|
# Of course it's simple to assign an IP block to the client with a simple
|
|
# ``add'' command, and then have the client use those IP numbers on its
|
|
# LAN rather than using ``nat enable yes''.
|
|
|
|
vpn-in:
|
|
set enddisc label
|
|
set speed sync
|
|
set mrru 1500
|
|
set mru 1504 # Room for the MP header
|
|
enable chap
|
|
disable lqr
|
|
set ifaddr REAL-LOCAL-IP REAL-ASSIGNED-IP
|