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Subject: Re: Cipe and masquerading.
From: Kurt Roeckx <Q,AT,ping,DOT,be>
Date: Thu, 26 Sep 2002 01:19:13 +0200
In-reply-to: <8D7C5F56B409554D9D46AC22195807F3061A83@exchwenz01.dmcwave.co.nz>

On Thu, Sep 26, 2002 at 10:06:26AM +1200, Rod Boyce wrote:
> Can you see the packets go across the CIPE connection.  'tcpdump -I cipe0 |
> grep icmp' will show pings going across the cipe network.  If this is the
> case and this works as you describe then.  Your problem is a routing problem
> and nothing to do with CIPE.  If this is not the case then you still have a
> CIPE problem this is unlikely.

If I ping (B) from (D), I'm pretty sure the
internet is not going to route it for me.  I also saw the
packets on the cipb0 and ppp0/eth0 interface.

> At least one end has to be listening on a known UDP port otherwise how does
> the tunnel know where to look in the first instance.

As long as D does not send something to B, B can't send something
to D because of the NAT.  Once D does send something, things work
perfectly.  Although, I'd like to use DNAT for it.


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