tcpdump and connection troubleshooting

Linux and Unix-Like Red Hat
1

Hello,

I have a client server application and the connection from client (redhat) becomes lost.

Is there a connection limit on Redhat Linux 4?
I want to use tcpdump to trace all packets between server and client: On the client side, I thought of running tcpdump. Is there a way to filter the tcpdump so that it displays only the traffic between the client and the remote server?

Do you have any other hints?

thanks.

2

There is no connection limit, what is your application, which protocol is using ? For the tcpdump, start tcpdump as root on the client side with :

tcpdump dst your-host-name

This will sniff all the packets from localhost to the destination server.

3

Hello sysgate,

the protocole used is RMI.
Can we narrow down the tcpdump you passed me so that it displays the traffic of a specific port?

thanks

4

talking about RMI, could there be a limitation on the tcp port number on my machine?

5

I don't think so, see the man pages for tcpdump and especially dst port and scr port.