fixing permission denied issue with udp 512 port graylog

use iptables to pre-route NAT the udp port :

 

iptables -A PREROUTING -t nat -i eth0 -p udp –dport 514 -j REDIRECT –to-port 10515

 

This will bypass the limit in the OS to ports < 1024 to non=root users .

nJoy 😉