I have a problem with a mikrotik router that has a 3g modem connected and gets a public ip.
Starting 2 days ago I noticed traffic coming in through that interface. I did a torch on the interface
and saw udp dns requests coming from..of course China. I then added a rule in the firewall to filter
dns requests since I don't need this service.(allow remote requests was already disabled)
The problem is that these are UDP requests so they keep coming even if I filter them(packets are dropped
in the firewall but this still uses bandwidth) and sometimes this kills my 3g connection.
Is there a way to prevent/stop this using routeros?