Problems when outgoing source port is altered by router

[Guus Sliepen]

On Mon, Sep 22, 2003 at 06:34:43PM +0200, yeahh at gmx.ch wrote:

> one of the 3 tinc servers is making troubles, when a connection is initiated
> from 
> this server over a zyxel 642 adsl router out to the other 2 servers in the 
> internet. the logfiles of the other 2 servers shows:
>  
>   > tinc[1398]: Received UDP packet from unknown source [ip-addr] port
> [random port number, but not 655]
[...]
> changing to indirectdata / tcponly is not an option for us, because voice
> over ip traffic 
> without udp is a nightmare :(
> 
> any thoughts?

Use another ADSL router :). But if you don't want to do that, you could
run "ping -q -i 60 <VPN IP address of server behind zyxel>" on the two
other servers, to make sure the one behind the zyxel is always contacted
first and the UDP flow the zyxel tracks never times out. As long as
the XP clients always contact that server first instead of the other way
around, all will be fine.

-- 
Met vriendelijke groet / with kind regards,
    Guus Sliepen <guus at sliepen.eu.org>
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