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gutimore
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Joined: Mon Aug 06, 2018 5:24 am

How to block massive UDP traffic?

Mon Aug 06, 2018 5:30 am

First, i'm not a network expert. But i need to solve a problem with the network of my company.

Some strange traffic is consuming almost all the bandwith. We have a Mikrotik router, and using the utility torch in winbox i found this outgoing UDP traffic; multiple unknow source ips and one destination ip, that belongs to the ISP.

Image

Is there a way of blocking all this UDP traffic and not causing a new problem?
 
Pea
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Posts: 233
Joined: Fri Jul 17, 2015 11:07 pm
Location: Czech

Re: How to block massive UDP traffic?

Mon Aug 06, 2018 8:11 pm

port 53 :)
Search for DNS Amplification
And fix your firewall on input chain!

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