Redirect port 80 to port 8080 for Tomcat

摘要: By default Tomcat’s HTTP connector listens on port 8080. Changing to port 80 in Linux environment is a tricky issue, since by default listening on any port under 1024 require a privileged user, and for security considerations it is not recommended to run Tomcat with elevated permissions. We can u...

By default Tomcat’s HTTP connector listens on port 8080. Changing to port 80 in Linux environment is a tricky issue, since by default listening on any port under 1024 require a privileged user, and for security considerations it is not recommended to run Tomcat with elevated permissions. We can use iptables to achieve this.

# open 80 port
sudo iptables -A INPUT -i eth0 -p tcp --dport 80 -j ACCEPT
# open 8080 port
sudo iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
# redirect port 80 to port 8080
sudo iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
# save iptables rules
sudo service iptables save
# make iptables auto start after reboot
sudo chkconfig --add iptables