I am trying to redirect all incoming traffic on UDP port 5060 to port 56790, and all outgoing traffic from 5060 to the port 56789. I used these iptables rules: iptables -t nat -I PREROUTING -p udp ! -s localhost --dport 5060 -j REDIRECT --to-port 56790 iptables -t nat -I OUTPUT -p udp ! -s localhost --sport 5060 -j REDIRECT --to-port 56789 I…