Download your favorite Linux distribution at LQ ISO.
Go Back > Forums > Other *NIX Forums > *BSD
User Name
*BSD This forum is for the discussion of all BSD variants.
FreeBSD, OpenBSD, NetBSD, etc.


  Search this Thread
Old 09-10-2008, 11:51 PM   #1
Registered: Jul 2004
Location: Ottawa
Distribution: Arch, OpenBSD
Posts: 123

Rep: Reputation: 17
Unhappy OpenBSD blocks every packets

I installed OpenBSD 4.2 to use as a router. I followed every setup steps:
sysctl net.inet.ip.forwarding=1
hostname.if (rl0 and bm0)

From the lan I get an ip from OBSD and I can ping the router.
From OBSD I get an ip from my ISP and I can ping
Now, even with the simplest pf rules:
block in all
pass out all
I get nothing from the lan to the net, nothing goes through the router.

Does anyone have any idea what might be wrong?
Old 09-11-2008, 12:17 AM   #2
Senior Member
Registered: Jul 2003
Location: Silicon Valley, USA
Distribution: OpenBSD 4.6, OS X 10.6.2, CentOS 4 & 5
Posts: 3,660

Rep: Reputation: 69
Is the LAN subnet different from the one you get from your ISP? If so, you need to enable NAT on OpenBSD as anything from your LAN is going to go to your ISP with a non-routable source IP address.

nat on $ext_if from $int_if:network to any -> ($ext_if)
Of course, all this is explained in the documentation, which you really should read:

PS oh, of course nothing is getting passed. You're blocking all packets going into bm0 and rl0 (and actually, lo0 too), and you're only passing packets out of the interfaces. Since the only packets that go out and interface before they go in are packets from the machine itself, that's the only traffic that's getting out. Traffic from your LAN has to go in your internal interface before it goes out your external interface.

Really, read the FAQ.

Last edited by chort; 09-11-2008 at 12:19 AM.


openbsd, pf, router

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
LXer: Fsck errors in the Linux filesystem on my OpenBSD laptop NOT caused by OpenBSD LXer Syndicated Linux News 1 08-31-2008 03:15 AM
LXer: OpenBSD: The OpenBSD Foundation LXer Syndicated Linux News 0 07-26-2007 10:31 AM
OpenBSD - Where can i get OpenBSD 3.7 ISO CD -- Please help me b:z Linux - Software 1 04-07-2005 08:46 AM
packets sent VS packets received fsasya Linux - Networking 0 07-18-2004 07:11 PM
encapsulating TCP packets in UDP packets... yoshi95 Programming 3 06-03-2004 02:53 PM

All times are GMT -5. The time now is 07:18 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration