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Old 11-25-2004, 01:36 PM   #1
Paul McLean
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tcpdump of a telnet session


Hi,

I need to produce a tcpdump of a telnet session (up until the login screen) and need a few pointers in how to set up the filters so that i only get the the telnet session packets and nothing else.

Any help would be apperated,

Thanks
 
Old 11-26-2004, 02:13 PM   #2
zaphodiv
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You could use ethereal instead and click "follow TCP connection", much easier.
 
Old 11-26-2004, 02:33 PM   #3
sigsegv
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Just like the man page says:


tcpdump -i <your interface> port 23

or, if you know the source IP:

tcpdump -i <your interface> host <sourceIP> and port 23

Those will only get you headers though. If you want the contents, you can do:

tcpdump -XX -s 0 -i <your interface> host <sourceIP> and port 23
 
  


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