Commit Graph

60 Commits

Author SHA1 Message Date
John Baldwin
66f8d384cf Allow the network addresses and interface names for the "client" and
"workstation" firewall types to be set from rc.conf so that rc.firewall
no longer needs local patching to be usable for those types.  For now
I've set the variables in /etc/defaults/rc.conf to the previous defaults
in /etc/rc.firewall.

PR:		bin/65258
Submitted by:	Valentin Nechayev  netch of netch.kiev.ua
Silence from:	net
MFC after:	2 weeks
2008-08-15 19:20:59 +00:00
John Baldwin
176baffe3f For the "client" and "simple" network types, collapse the separate "net"
and "mask" variables into a single "net" variable that contains a full
network address (including either a netmask or prefix length at the user's
choice).  Update the example settings to match.

MFC after:	2 weeks
2008-08-15 19:14:25 +00:00
John Baldwin
228835b658 Use 'me' rather than explicit IP addresses for the "simple" and "client"
firewall configurations.

PR:		bin/65258
Silence on:	net@
MFC after:	1 week
2008-08-15 18:58:15 +00:00
Daniel Gerzo
1f696cd2bc - back out my last commit as it seems to be wrong.
Spotted by: das
2008-08-03 19:01:07 +00:00
Daniel Gerzo
f8c76347e1 - dns queries might go also over TCP, so allow it.
Approved by:	rink
MFC after:	1 week
2008-07-17 20:00:18 +00:00
Giorgos Keramidas
02ca51529e Tweak rc.firewall to allow incoming limited broadcast traffic,
when configured to run in 'client' mode.

PR:		conf/15010
Submitted by:	Bill Trost, trost at cloud.rain.com
Reviewed by:	bz
MFC after:	2 weeks
2008-06-06 07:17:04 +00:00
Rong-En Fan
8602063e3c Improve kernel NAT support in rc.firewall
- Allow IP in firewall_nat_interface, just like natd_interface
- Allow additional configuration parameters passed to ipfw via
  firewall_nat_flags
- Document firewall_nat_* in defaults/rc.conf

Tested by:	Albert B. Wang <abwang at gmail.com>
MFC after:	1 month
2008-01-21 04:41:18 +00:00
Maxim Konovalov
991eaf3af4 o Correct an info about "Firewalls and Internet Security" book: name,
authors list, ISBN, URLs.

PR:		conf/119590
MFC after:	1 week
2008-01-12 19:02:09 +00:00
Robert Watson
49718b0c43 s/IPFW(4)/ipfw(4) to match the actual man page name.
Submitted by:	ru
2007-04-05 10:44:25 +00:00
Robert Watson
162637bb13 In rc.firewall, make it clear that this is the setup for IPFW(4), and not
for the sundry other firewalls in the system.

MFC after:	3 days
Submitted by:	Richard dot Clayton at cl dot cam dot ac dot uk
2007-04-02 14:02:06 +00:00
Paolo Pisati
ff2f6fe80f Summer of Code 2005: improve libalias - part 2 of 2
With the second (and last) part of my previous Summer of Code work, we get:

-ipfw's in kernel nat

-redirect_* and LSNAT support

General information about nat syntax and some examples are available
in the ipfw (8) man page. The redirect and LSNAT syntax are identical
to natd, so please refer to natd (8) man page.

To enable in kernel nat in rc.conf, two options were added:

o firewall_nat_enable: equivalent to natd_enable

o firewall_nat_interface: equivalent to natd_interface

Remember to set net.inet.ip.fw.one_pass to 0, if you want the packet
to continue being checked by the firewall ruleset after being
(de)aliased.

NOTA BENE: due to some problems with libalias architecture, in kernel
nat won't work with TSO enabled nic, thus you have to disable TSO via
ifconfig (ifconfig foo0 -tso).

Approved by: glebius (mentor)
2006-12-29 21:59:17 +00:00
Poul-Henning Kamp
891cf3ad81 Give rc.firewall a polish and a new method.
Factor out the loopback setup

Use "me" instead of hardcoded $ip where possible.

Add "workstation" which protects just this machine with stateful
    firewalling.  Put the variables for this in rc.conf.

Submitted by:	Flemming Jacobsen <fj@batmule.dk>
Reviewed by:	cperciva
2006-10-28 20:08:12 +00:00
Hajimu UMEMOTO
d1bb0919f0 don't match packets other than IPv4 against divert rule.
divert supports only IPv4.

Reported by:	SAITOU Toshihide <toshi__at__ruby.ocn.ne.jp>
Discussed with:	suz
MFC after:	1 day
2005-11-18 02:23:59 +00:00
Ruslan Ermilov
2faf03309d DNS should not necessarily be named(8), tweak the comment a bit. 2003-11-02 07:31:44 +00:00
Tom Rhodes
133c1315d5 Add a header: #!/bin/sh.
PR:	44363
2003-02-06 22:00:38 +00:00
Crist J. Clark
5439c489f8 Bring rc.firewall{,6} more in line with the word and spirit of
rc.conf(5) and the files' inline documentation.

  - Add the "closed"-type, documented in both places, but which did not
    exist in the code.

  - When provided a ruleset, the system should not make any assumptions
    about the sites's policy and should add no rules of its own.

  - Make the "UNKNOWN" (documented in-line) actual work as advertised,
    load no rules.

Prodded by:	Igor M Podlesny <poige@morning.ru>
MFC after:	1 week
2002-02-21 13:14:19 +00:00
Luigi Rizzo
8029d085df Remove a stale entry related to passing ARP with bridging and ipfw.
This feature has been removed since 4.1 times and it is only a source
of confusion.

Same needs to be done on -stable.

MFC after: 1 day
2001-12-27 05:40:09 +00:00
Dima Dorfman
f20347445f Sync the code that sucks in rc.conf and friends with what's in
rc.firewall6.  Specifically, don't do anything
if [ -z ${source_rc_confs_defined} ].  Not doing this leads to a problem
with dependencies: chkdepend will set, e.g., portmap_enable to YES if
some service that needs portmap is enabled, but rc.network sources
rc.firewall, which used to source defaults/rc.conf unconditionally,
which would result in portmap_enable being set back to NO.

PR:		29631
Submitted by:	OGAWA Takaya <t-ogawa@triaez.kaisei.org>
2001-08-14 05:50:19 +00:00
David E. O'Brien
594db5c9da style nit 2001-03-06 02:15:38 +00:00
David E. O'Brien
20335a31ad Also deny 127.0.0.0/8 going out.
Submitted by:	grimes
2001-03-05 20:51:40 +00:00
Dag-Erling Smørgrav
7a6ac3e087 Fix references to Chapman & Zwicky and Cheswick & Bellowin.
PR:		24652
Submitted by:	jjreynold@home.com
2001-02-25 11:44:51 +00:00
Nick Sayer
5b9c7d3e5b Fix some glaring insecurities in the prototype firewall configurations.
pass udp from any 53 to ${oip}

allows an attacker to access ANY local port by simply binding his local
side to 53. The state keeping mechanism is the correct way to allow DNS
replies to go back to their source.
2001-02-20 19:54:31 +00:00
David E. O'Brien
a1c43e3fbb Add copyright notices. Other systems have been barrowing our /etc files
w/o giving any credit.
2000-10-08 19:20:36 +00:00
Ruslan Ermilov
890fc9495b Only install `divert natd' rule for predefined firewall types,
not when ${firewall_type} is set to a filename, as we know
nothing about user's script specifics.

Reported by:	Bernhard Valenti <bernhard.valenti@gmx.net>
2000-08-30 13:14:32 +00:00
Ruslan Ermilov
13fa4c5e31 Make natd(8) "compatible" with firewall_type="simple".
PR:		conf/13769, conf/20197
2000-08-04 14:02:11 +00:00
David E. O'Brien
d8e52ef8e0 Update rev 1.29 -- 'draft-manning-dsua' is now in its 3rd version. 2000-07-30 19:28:05 +00:00
Paul Saab
8cf43c44ea Add an explicit rule number to natd so you do not end up with two
rule 100's.

Submitted by:	Jan Koum <jkb@yahoo-inc.com>
2000-05-08 20:28:20 +00:00
Sheldon Hearn
f66e7afa28 Add to defaults/rc.conf a new function source_rc_confs which rc
scripts may use to source safely overrides in ${rc_conf_files}
files.

This protects users who insist on the bad practice of copying
/etc/defaults/rc.conf to /etc/rc.conf from a recursive loop
that exhausts available file descriptors.

Several people have expressed interest in breaking this function
out into its own shell script.  Anyone who wants to embark on
such an undertaking would do well to study the attributed PR.

PR:		17595
Reported by:	adrian
Submitted by:	Doug Barton <Doug@gorean.org>
2000-04-27 08:43:49 +00:00
Brian S. Dean
ee4619f2a7 Back out the hook to execute the file ${firewall_type}. The intended
purpose of the hook was to provide the ability for a shell program to
instantiate the firewall rules instead of forcing them to be
statically coded.  This functionality was already present through the
use of ${firewall_script}, and I see no need to keep the
${firewall_type} hook around.

Reminded by: Dag-Erling Smorgrav <des@freebsd.org>
2000-04-27 00:48:59 +00:00
Brian S. Dean
2ee229e5c3 Allow the firewall rules to be established by a shell script instead
of forcing them to be an 'ipfw' rules file.  This allows one to
determine interface addresses dynamically, etc.  The rule is if the
file referenced by ${firewall_type} is executable, it is sourced, but
if it is just readable, it is used as input to 'ipfw' like before.
2000-04-16 02:28:42 +00:00
Paul Richards
f49c61a73a Add a firewall_flags option that is used when ipfw processes a file. It allows
you to run a preprocessor, such as m4, so that you can use macros in your
rules file.

Approved by:	jkh
2000-02-06 19:25:00 +00:00
Rodney W. Grimes
9b20e2ca56 Update this with the additional nets recomended by reading
draft-manning-dsua-01.txt.

Stop using public addresses as samples and use the recommended
192.0.2.0/24 netblock that has specifically been set aside for
documentation purposes.

Reviewed by:	readers of freebsd-security did not respond to a request
                for review
2000-01-28 11:30:28 +00:00
David E. O'Brien
ee7f6d9f9b Minor whitespace fix. 1999-12-04 01:27:51 +00:00
Ruslan Ermilov
8a9c5a82c0 Pass IP fragments with non-zero offset. The semantics of matching
IP fragments has been changed in src/sys/netinet/ip_fw.c,v 1.78.

Reminded by:	"Ronald F. Guilmette" <rfg@monkeys.com>
1999-11-04 10:13:59 +00:00
Nick Sayer
3af7d635f1 Add commented entry to the lo0 section inviting bridge users to
enable ARP on filtering bridges.
1999-10-24 00:26:49 +00:00
Ruslan Ermilov
59e92b4999 Allow for incoming DNS UDP queries. 1999-10-20 08:15:13 +00:00
Mike Pritchard
c124f1f780 Fix a typo in a comment. 1999-09-30 04:55:23 +00:00
Sheldon Hearn
321704296f Apply a consistent style to most of the etc scripts. Particularly, use
case instead of test where appropriate, since case allows case is a sh
builtin and (as a side-effect) allows case-insensitivity.

Changes discussed on freebsd-hackers.

Submitted by:	Doug Barton <Doug@gorean.org>
1999-09-13 15:44:20 +00:00
Peter Wemm
9b7a44a60e $Id$ -> $FreeBSD$ 1999-08-27 23:37:10 +00:00
Sheldon Hearn
b68adff6b7 Style clean-up:
* All variables are now embraced: ${foo}

	* All comparisons against some value now take the form:
	  [ "${foo}" ? "value" ]
	  where ? is a comparison operator

	* All empty string tests now take the form:
	  [ -z "${foo}" ]

	* All non-empty string tests now take the form:
	  [ -n "${foo}" ]

Submitted by:	jkh
1999-08-25 16:01:45 +00:00
Jordan K. Hubbard
9c63624e6f Use /etc/defaults/rc.conf everywhere, falling back to /etc/rc.conf
as necessary (for half-assed upgrades).
1999-02-10 18:08:16 +00:00
Alexander Langer
0804188c52 Strengthen the rules governing the 127.0.0.0/8 subnet. The previous rules
allowed external hosts to send packets to the 127.0.0.0/8 subnet on the
firewall host.

Renumber the lo0 rules to guarantee they appear first.

PR:		6406
Submitted by:	Archie Cobbs <archie@whistle.com>
1998-04-25 00:40:55 +00:00
Brian Somers
252ba33d3c Add natd support.
PR:		6339
Submitted by:	cdillon@wolves.k12.mo.us
1998-04-18 10:27:19 +00:00
Poul-Henning Kamp
3d10253c7d Better RFC1918 network protection
PR:		6278
Reviewed by:	phk
Submitted by:	Ruslan Ermilov <ru@ucb.crimea.ua>
1998-04-15 16:41:14 +00:00
Adam David
7f06341409 get default firewall type from rc.conf 1998-02-10 01:45:57 +00:00
Daniel O'Callaghan
a9a7f08317 MF22 - make firewall_type a little more robust 1997-10-21 00:54:08 +00:00
Daniel O'Callaghan
24e24b0737 Fix some problems in the rules file loading and need for modload detection.
Found by: "James E. Housley" <housley@pr-comm.com>
1997-09-18 22:43:48 +00:00
Daniel O'Callaghan
5f4feab696 Reviewed by: msmith, alex
Cosmetic changes to the loading of firewall rules and lkm.
1997-09-11 10:59:02 +00:00
Jordan K. Hubbard
1218780bd1 Add inetd_flags and way of passing ipfw a configuration file
(if firewall = "somefilename").

Fix typo fixes and URLs which were accidently nuked out of this
file (submitted by: soil@quick.net via PR#3501).

Submitted by:	"Danny J. Zerkel" <dzerkel@phofarm.com>
1997-05-05 07:08:31 +00:00
Jordan K. Hubbard
0862a4aff9 Update the etc world from RELENG_2_2 which is now more up-to-date
(gotta get myself -current again, this is a drag).

Also-fixes-problems-noted-by: Wolfgang Helbig & Joerg Wunsch
1997-05-03 11:22:17 +00:00