nixCraft

Dear all,
I am trying to forward packets coming to one ip address(say 192.168.1.222 port 4080) to another ip address (say 192.168.1.11.

I tried the following rule:

iptables -t nat -A PREROUTING -p tcp -d 192.168.1.222 --dport 4080 -j DNAT --to-destination 192.168.1.118

But it did not work. I also observed that,

iptables -t nat -A PREROUTING -p tcp -d 192.168.1.118 --dport 4080 -j DNAT --to-destination 192.168.1.118:4088

works, i.e, port redirection works.

I tried out google and also read a couple of tutorials but unfortuately I am still unable to find the problem.

I am using Red Hat 8 on both the computers.

Can any one point me to the right direction?

Thanks,
Ranjan

But it did not work. I also observed that,

Because you did not specified the port in --to-destination IP:PORT. You need to give port also it can not guess it

works, i.e, port redirection works.

Answer it as above for second

This port redirection (iptables based) will only works if the destination is in the same network on locally attached interface. If you need to forward it to other network then you need tiny utility called rinetd which is a TCP port redirector. See http://www.boutell.com/rinetd/ for more and to download it.

rinetd is my personal choice

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