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My VM has set some rules for access to a web server and a SSH. The server is running in the internal port 8080 en redirected using iptables to the port 80 with the command:

iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 8080

When i add the rule to DROP INPUT and afterwards the one for oppening the port

IPTABLES -A INPUT -p tcp --dport 80 -j ACCEPT

it doesnt work.

I have the same setup on port 4422 for the SSH server and works perfectly but not in the http one.

IPTABLES --LIST:

Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:4422
ACCEPT     all  --  anywhere             anywhere(this one is for the lo)
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http
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Prerouting takes place before INPUT, so you will need to ACCEPT from 8080, not 80.

IPTABLES -A INPUT -p tcp --dport 8080 -j ACCEPT
  • this is the solution. – Pablo Mujica Apr 11 '16 at 2:11

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