View connections to sendmail or port 25

Head Surfer
October 9th, 2008

Login to the server via ssh

netstat -an | grep “:25 “| grep ESTABLISHED | awk ‘{print $4″t”$5}’ | sort -n -k1

You can also view connections to the server on other ports like port 80 which is usually apache:
netstat -an | grep “:80 “| grep ESTABLISHED | awk ‘{print $4″t”$5}’ | sort -n -k1

or pop:
netstat -an | grep “:110 “| grep ESTABLISHED | awk ‘{print $4″t”$5}’ | sort -n -k1

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