Linux Yocto UDP Port Forwarding

Woutlaw · 02-07-2024, 12:27 AM

Hello,

New to learning Linux, I have a data aggregator/cell router and I want to setup UDP port forwarding. I want to access multiple devices behind the cell router via one IP address. For example, I want to be able to go to a web browser and type in XXX.XXX.XXX.XXX

ublic port and access web interface of a local device behind the router. I've done this before a while back but didn't take notes. Attached is the .sh file I'm looking to edit, any guidance will be appreciated.

teckk · 02-07-2024, 05:09 PM

You made a pdf with an image, with text that cant be copied? Of a bash script?

Post stuff like that between code tags

Code:

#!/bin/bash

if [ "$#" -ne 3 ]; then
    echo "Add port forwarding to IPtables for 30 minutes"
    echo "Usage $0 <listen port> <IP Address of device> < device port"
    exit -1
fi

iptables -t nat -A POSTROUTING -j MASQUERADE
iptables -t nat -A PREROUTING -p udp -d 10.0.1.34 --dport $1 -j DNAT --to-destination $2:$3