Add the -p option to netstat, and you'll see the program name. Since your source port is "80", it sounds like you're running a webserver. If you're not running a webserver... then something else is on that port! -----Original Message----- From: redhat-list-bounces@xxxxxxxxxx on behalf of Krautkramer, John Sent: Wed 6/24/2009 1:38 PM To: redhat-list@xxxxxxxxxx Cc: Subject: Identifying and Stopping Unwanted Net Traffic Hi, I have a machine running RHEL5.0 that is clogging up my network connection sporadically. Below is the output of "netstat -tn" while the machine is acting up. Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 1 192.168.1.41:55200 66.102.7.100:80 FIN_WAIT1 tcp 0 1 192.168.1.41:35291 66.102.7.101:80 FIN_WAIT1 tcp 0 0 192.168.1.41:46541 85.17.35.51:80 ESTABLISHED tcp 0 1 192.168.1.41:42623 66.102.7.100:80 FIN_WAIT1 tcp 0 0 192.168.1.41:55673 66.102.7.97:443 ESTABLISHED tcp 0 96876 ::ffff:192.168.1.41:80 ::ffff:211.125.38.105:55594 ESTABLISHED tcp 0 116532 ::ffff:192.168.1.41:80 ::ffff:211.125.38.105:55628 ESTABLISHED I believe it's the last 2 entries that are the problem. How do I determine what these are and what on the system is generating the traffic? I've also observed the Foreign Address is not always the same. Today the problem addresses are different. I know the solution is to find what is causing the traffic if I can, but in the mean time, is there a way to block the traffic? I tried blocking it at the DNS server with OpenDNS but they don't accept the IPV6 addresses. Any ideas would be greatly appreciated! John -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=subscribe https://www.redhat.com/mailman/listinfo/redhat-list
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