port numbers

Linux: Find Out Which Process Is Listening Upon a Port

by on October 31, 2010 · 18 comments

How do I find out running processes were associated with each open port? How do I find out what process has open tcp port 111 or udp port 7000 under Linux?

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Debian / Ubuntu: Apache2 Change Default Port / IP Binding

by on November 14, 2008 · 12 comments

Question: How do I change Apache 2 default port under Debian / Ubuntu Linux? I’ve couple of public IPv4 address assigned by my ISP, how do I force Apache2 to listen to a specific IP address? How do I change Apache2 IP address binding?

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Linux Firewall: Display Status and Rules of Iptables Firewall

by on June 17, 2007 · 1 comment

Q. How do I display / list all rules in the selected chain? How do I find out which rules are active? What is blocked and opened with my firewall? A. To List all rules in the selected chain use the -L option. If no chain is selected, all chains are listed. As every other [...]

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