drop/reject are not allowed in nat, so, forward to other port if source matches.
|
1 |
iptables -t nat -I PREROUTING -i {SOME_INTERFACE} -p tcp --destination-port {INPUT_PORT} -j REDIRECT --to-ports {NEW_PORT} |
iptables disallow nat by source by @sskaje: https://sskaje.me/2016/08/iptables-disallow-nat-source/
Link to this post!