Redirecting incoming packets to other port

["Holger Kinkelin" <holger.kinkelin@xxxxxxxxx>]

Hello everybody

how can I redirect packets sent to my computer to another port?

I tried: iptables -A PREROUTING -t nat -p udp --dport 5060 --sport
5060 -j DNAT --to-destination 192.168.0.21:5063

This rule is accepted but doesn't do anything. There are no other
rules that could cause side effects.

Regards,
Holger