Re: [m0n0wall] Ports used by IPSEC connections? My m0n0wall is behind another firewall

From:	Bjoern Euler <lists at edain dot de>
To:	Jonathan Romero <jromero at raydiance dash inc dot com>
Cc:	m0n0wall at lists dot m0n0 dot ch
Subject:	Re: [m0n0wall] Ports used by IPSEC connections? My m0n0wall is behind another firewall
Date:	Mon, 11 Sep 2006 20:41:10 +0200

Jonathan Romero wrote:

> I would like to be able to do IPSEC connections with this unit, but I
> need to tell the site admin what ports/protocols he needs to open up
> for this to work.

You'll need UDP Port 500 and IP Proto 50 (ESP). Depending on the NAT 
implementation on the router in front of your box you may have troubles, 
though.

Also have a look at this:
http://doc.m0n0.ch/handbook/faq-ipsec-nat-t.html

Regards,
-Björn