Need hep forwarding port across interfaces

Nathan · 2013-06-14 18:13:14

I have a raspberry pi running XBMC plugged into one interface over a crossover cable. Both have static IPs set up. I want to forward incoming traffic to the computer on port 8080 to the raspberry pi so I can control it from my phone. As it currently is, nothing can communicate with the pi besides the computer it is plugged into.

I tried various guides on how to forward ports but I couldn't get any of the iptables rules to work. I flushed between each attempt, but nothing did anything. The computer is plugged into the main router on enp3s0 and the pi on enp5s6.

Any help? I really have no idea what I'm doing.

sbmomeni · 2013-07-29 05:31:13

Did you try setting "net.ipv4.ip_forward = 1" in sysctl?
Also you can use ssh port forwarding (if you just want to forward one port) as follows:

ssh -L yourip:8080:127.0.0.1:8080 username@ip-of-the-XBMC-machine

Then you can connect to yourip:8080 instead of connecting to XBMC's ip.

fukawi2 · 2013-07-29 05:35:17

Including exactly what you've tried would help, because you've probably already tried this, but this is what should do it:

echo 1 > /proc/sys/net/ipv4/ip_forward 
iptables -t nat -I PREROUTING -i enp3s0 -p tcp --dport 8080 -j DNAT --to 192.0.2.1
iptables -I FORWARD -i exp3s0 -p tcp --dport 8080 -d 192.0.2.1 -j ACCEPT

Replace 192.0.2.1 with the actual IP Address of the Pi

Arch Linux

#1 2013-06-14 18:13:14

Need hep forwarding port across interfaces

#2 2013-07-29 05:31:13

Re: Need hep forwarding port across interfaces

#3 2013-07-29 05:35:17

Re: Need hep forwarding port across interfaces

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