[olug] Cisco IPSec vpn behind Linux 2.4 NAT box?

[djalexander at cox.net]

I run a linux firewall ditro called IPCop 
(http://ipcop.sourceforge.net) which is based on kernel 2.4 and 
iptables.  As far as I can tell, I don't have to do anything to allow 
my clients to connect to ipsec based VPNs.  I regularly connect to an 
ipcsec VPN simultaneously from multiple machines on he LAN with no 
additional rules or kernel modules.  This may be because my Cisco VPN 
client does NAT-T.  It's the only client I have ever used on this 
particular setup, so YMMV.

I hope this helps.

On Mar 30, 2005, at 3:02 PM, Adam Haeder wrote:

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> Does anyone have experience connecting to a Cisco VPN that is on a 
> private
> IP subnet behind a Linux box doing NAT? The Linux box is RedHat9 with 
> the
> 2.4 kernel. If it's possible/easy, what would an iptables script look 
> like
> to enable it? TIA
>
> - --
> Adam Haeder
> Vice President of Information Technology
> AIM Institute
> adamh at omaha.org
> (402) 345-5025 x115
> PGP Public key: http://www.haederfamily.org/pgp.html
>
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--
Darren Alexander
Unix System Administrator
Meridian, Inc.
4805 G. St.
Omaha, NE 68117
(402) 501-7510