Using tcpdump...

[hk-cbb]

Dear All,

I have a DS20E running Tru64 (T64V51B, pk3). We have encountered a strange problem wherein if we issue "telnet 192.168.1.27 1521" (192.168.1.27 is a PIX firewall NAT-ted address to our Oracle 10g database), the connection goes through at times but does not otherwise. This NAT-ted address always works for other ports (e.g.21). The problem is only on this IP and that too only for port 1521.

We cannot change this NAT-ted IP as there are several JSPs on our Intranet that uses this IP.

I want to run tcpdump on this Server's only network card to capture traffic to port 1521 on the NAT-ted IP. What should the entire command be to achieve this?

[Ivan Ferreira]

Please see "man packetfilter" and "man tcpdump".

cd /dev
./MAKEDEV pfilt
pfconfig +c
tcpdump -n -l -f -i port 1521