From mboxrd@z Thu Jan  1 00:00:00 1970
From: Philip Craig <philipc@snapgear.com>
Subject: Re: pptp-conntrack-nat
Date: Thu, 12 Jun 2003 11:52:56 +1000
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To: Mike Machado <mike@innercite.com>
Cc: netfilter@lists.netfilter.org

Mike Machado wrote:
> I used CVS/POM and patched my vanilla 2.4.20 kernel to include support
> for ip_conntrack_pptp and ip_nat_pptp, but after I do this, the
> MASQUERADE target no longer works. lsmod shows both modules load
> successfully as well as the ipt_MASQUERADE, but when I run my nat rule:
> 
> iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -o eth0 -j MASQUERADE
> 
> it just says Invalid Argument. I have two identical kernels, one with
> the pptp patch applied, one without, and the one without allows the
> MASQUERADE target just fine. Is there a known bug with the latest CVS
> pptp-conntrack-nat patch interfearing with masquerading? Thanks.

The pptp patch changes the size of the kernel structures.
You need to recompile the userspace iptables.

-- 
Philip Craig - philipc@snapgear.com - http://www.SnapGear.com
SnapGear - Custom Embedded Solutions and Security Appliances