Hi

What is the RedHat Linux command that changes from port 8080 to port 80? I'm using Tomcat 4.1.27. This is my own desktop computer so I'm the root administrator.

Tina

There is no command that makes Tomcat listen to different ports. If I'm reading the Tomcat documentation correctly, you'll have to change the port in Tomcat's server.xml file.

Thank you. Obviously I've asked the wrong question. How do I change the port in Tomca'ts server.xml file?

Tina

Just open up server.xml in your favorite text editor, find the section that sets the port, change it from 8080 to 80, save and your done. You may have to be root or su to make the changes.

And I would strongly suggest reading some of the documentation on the Tomcat site. That way you'll have a better idea of what to look for once you have the file open.

Although you can change to port from 8080 to 80 in server.xml, you should think about doing this via an iptables redirection to avoid a security issue with giving straight access to port 80 (or any port less than 1024)

As root, type these three commands:
iptables -t nat -A OUTPUT -d localhost -p tcp --dport 80 -j REDIRECT --to-ports 8080
iptables -t nat -A OUTPUT -d xxx.xxx.xxx.xxx -p tcp --dport 80 -j REDIRECT --to-ports 8080
iptables -t nat -A PREROUTING -d xxx.xxx.xxx.xxx -p tcp --dport 80 -j REDIRECT --to-ports 8080

...where xxx.xxx.xxx.xxx is your ip address (or DNS name).

Additionally, for ssl (8443 --> 443):
iptables -t nat -A OUTPUT -d localhost -p tcp --dport 443 -j REDIRECT --to-ports 8443
iptables -t nat -A OUTPUT -d xxx.xxx.xxx.xxx -p tcp --dport 443 -j REDIRECT --to-ports 8443
iptables -t nat -A PREROUTING -d xxx.xxx.xxx.xxx -p tcp --dport 443 -j REDIRECT --to-ports 8443

Hope this is of some use.

Dave