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[Richard Cheung <question78957@xxxxxxxxxxxxxxxxxxxxx>]

Question #78957 on linux in ubuntu changed:
https://answers.launchpad.net/ubuntu/+source/linux/+question/78957

Richard Cheung gave more information on the question:
Now I have set up my server with some application installed and I have
enabled NAT and port forwarding. Here are the rules of the iptables.

----------------------------------------------------------------------------------------------------
iptables -L

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
fail2ban-ssh  tcp  --  anywhere             anywhere            multiport dports ssh 

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain fail2ban-ssh (1 references)
target     prot opt source               destination         
RETURN     all  --  anywhere             anywhere            

----------------------------------------------------------------------------------------------------
iptables -t nat -L

Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         
DNAT       tcp  --  anywhere             059149065231.ctinets.com tcp dpt:3390 to:10.1.1.1:3390 

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination         
MASQUERADE  all  --  anywhere             anywhere            

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

----------------------------------------------------------------------------------------------------

Any ideas?

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