Page 1 of 1

Rule to target specific UDP traffic

Posted: Wed Apr 06, 2022 12:00 pm
by sarky
Good Morning All

Just wondering how do I target this specific traffic, so I can add them to the list
without affecting my local network.

I have attached a screen shot showing same ip opened 2 connections to the router.

protocol UDP
on one SRC using port 80 ---> Hitting DNS and basically saturating my link.

At the moment, I'm just monitoring the traffic and if I see an unusual traffic I am manually blocking
it thereafter the same thing happens again with a different SRC.

Thanks guys in advance

Sarky

Re: Rule to target specific UDP traffic  [SOLVED]

Posted: Wed Apr 06, 2022 2:38 pm
by Sob
There's traffic in both directions, do you have open resolver (= generally bad thing)? It would be good idea to fix that.

Re: Rule to target specific UDP traffic

Posted: Wed Apr 06, 2022 3:30 pm
by sarky
Thanks

I don't know why I didn't think about the simplest method as just blocking external traffic to the DNS.

Added the rules, hopefully that should fix it.

Thanks again

Sarky

Re: Rule to target specific UDP traffic

Posted: Wed Apr 06, 2022 3:45 pm
by anav
The default rules block WAN to Router traffic (including external DNS) and WAN to LAN traffic, what did you do to mess that up?