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Subject: Re: CIPE 1.5.4 output bypassing iptables?
From: Holger Marzen <holger,AT,marzen,DOT,de>
Date: Mon, 22 Jul 2002 00:05:41 +0200
In-reply-to: <16051008836.20020721105302@streibhardt.de>

On Sun, 21 Jul 2002, Joerg Dahlem wrote:

> got a problem concerning CIPE 1.5.4 and 1.5.3 with iptables from Kernel
> 2.4.18-5 The UDP packets _sent_ by CIPE seem to bypass the complete
> firewall code. At least I am not able to catch them with rules...

I cannot second that. I have a cipe-tunnel using port 20002:

1155  106K ACCEPT  udp  --  ppp+  *  0.0.0.0/0 0.0.0.0/0  udp spt:20002 
dpt:20002

As you see the rule catches. I have kernel 2.4.13, but that shouldn't
matter. Probably another rule or your default policy catches.





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