On Centos 6.4, I want to block all incoming ports except 22, 80 and 443. 80 (external) should be redirected 8080 (internal). 443 (external) should be redirected to 8181 (internal). I used the following commands:
service iptables stop
iptables -A INPUT -i eth0 -p tcp --dport 80 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 443 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 22 -j ACCEPT
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8080
iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 443 -j REDIRECT --to-port 8181
service iptables save
service iptables restart
However, I can still access ports 8080 and 8181. Is there a way to block ports 8080 and 8181 externally and still have open internally for redirection from 80 and 443?
iptables
performs its checks. Also be aware that there are two mistakes above:tco
should betcp
and-AINPUT
should be-A INPUT
.