Hello
I need to discover a traffic protocol in my Router, EX: RTP. How can i do this?
Well, if you know the port number(s) it will use, the easiest thing to do is just put a mangle table rule in the prerouting chain:
/ip firewall mangle
add chain=prerouting protocol=udp port=53 action=mark-connection new-connection-mark=DNS
With this rule in place, you can look in the ip firewall connections table, and all DNS connections would have DNS visible in the connection mark column.
Unfortunately, RTP is not so straightforward to recognize because it doesn’t use any standard port and doesn’t have some heading that says “hey, I’m RTP” but if your RTP is to/from a certain set of IPs / ports, you can put those into your match criteria.