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Subject: Re: IP Masq over CIPE tunnel.
From: Geir Sjurseth <geir,AT,netch,DOT,se>
Date: Tue, 21 Aug 2001 15:22:44 +0200
In-reply-to: <3B825974.AE130A8F@ebbs.com.au>

I just wanted to say that I too have had this exact problem, and have
heretofore been unable to solve it.

Geir... With kernel 2.4.6

Geir

On Tue, 21 Aug 2001, Robert Davidson wrote:

>
> Hi all,
>
> Does anyone know of any reason why no matter what I do I can not get
> IP Masquerading working over the CIPE tunnel (Kernel 2.4.8 and 2.4.9).
>
> The default gateway points to the remove end of the cipe tunnel.
>
> The iptables command I'm using to do the masquerading is:
>
>   iptables -t nat -A POSTROUTING -o cipcb0 -s 192.168.1.0/24 -j
> MASQUERADE
>
> Using tcpdump on the cipcb0 interface says the packets are coming from
> 192.168.1.1, which they are, but they're supposed to be getting
> masqueraded.
>
>   tcpdump: listening on cipcb0
>   22:46:53.068355 192.168.1.1.33646 > 203.34.65.50.33435:  udp 10 [ttl
> 1]
>   22:46:58.066598 192.168.1.1.33646 > 203.34.65.50.33436:  udp 10 [ttl
> 1]
>   22:47:03.066570 192.168.1.1.33646 > 203.34.65.50.33437:  udp 10 [ttl
> 1]
>
> I'm using the traceroute command to specify the source address of the
> packets, like so:
>
>   traceroute -n -s 192.168.1.1 203.34.65.50
>
> eth0 on the pc has an address of 192.168.1.1.
>
> I've also tried flushing all firewall rules with no success.
>
> Any ideas?
>
>

-- 
Geir Sjurseth && System Administrator
Netch Technologies AB
Scheelevägen 16
223 63 Lund
Office  +46 46 272-1679
Mobile  +46 73 310-7490





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