topic Identifying network port pairs in Operating System - HP-UX

Identifying network port pairs

George Spencer — Thu, 27 Mar 2003 09:32:47 GMT

Is there a fast way of identifying the network port pairs? I am trying to identify the local and remote port pairs that are in use at a particular point in time, and found that netstat takes forever, and ndd is unreliable. Is there a simple method that I am missing?

Re: Identifying network port pairs

Stefan Farrelly — Thu, 27 Mar 2003 09:49:55 GMT

Use lsof, it will do it. You can download from;

http://hpux.cs.utah.edu/ftp/hpux/Sysadmin/lsof-4.64/

Re: Identifying network port pairs

Ron Kinner — Thu, 27 Mar 2003 14:43:38 GMT

Instead of netstat -a try
netstat -an
or better
netstat -an |grep tcp

The delay is caused by netstat looking up the hostname for each IP address via DNS. The n option says just give us the ip address and don't worry about the hostnames.

Ron

Re: Identifying network port pairs

Michael Steele_2 — Thu, 27 Mar 2003 14:59:38 GMT

lsof -i tcp:23 (* list open files for tcp socket 23 *)

lsof -i udp:123 (* list open files for udp socket 123 *)