Hi all

recently, I set up a firewall like environment, where different
ports of a linux server are forwarded to servers behind this
machine. I don't have any problems with TCP packets.

But I'm not able to get any UDP packets behind the linux port
forwarder (the intended service was DNS). I used the following
rules (besides others for TCP protocols):

10.0.0.1:/ # ipmasqadm portfw -l -n
prot localaddr   rediraddr    lport  rport  pcnt  pref
UDP  10.0.0.1    192.168.1.3   53     53     8    10
TCP  10.0.0.1    192.168.1.3   53     53    10    10

Telnetting to 10.0.0.1 53, I get the connect as expected. Using
nslookup www.xxx.ch 10.0.0.1, I don't get any response (just a
timeout after some time).

What did I do wrong? Does port forwarding nor work for UDP? Where
can I find more vorbose information for port forwarding than with
the -h option of ipmasqadm?

Bye

Emmerich
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