Router reporting: Detect UDP port scan attack - from MTN

[Grant]

help me understand what is going on here.
firstly, this is a backup router with an MTN sim card, on data contract.

very recently there have been a number of "security alerts":
running traceroute reveals it is MTN attempting to scan UDP ports.

question is why are they scanning UDP ports
&
if the scans were not blocked, what would MTN be doing if they gained access ?

school me !!

Detect UDP port scan attack, and the attack has been blocked, scan packet from 209.212.96.1

 

[yogidabear]

Its UDP and probably just port 53. Its likely the anycast DNS server, and not something malicious.

If your router told you what ports and how many requests it would help. Right now it looks like twice a day they knock on your UDP port 53 and see if anybody answers.

 

[Grant]

Right now it looks like twice a day they knock on your UDP port 53 and see if anybody answers.

Worse than Jehova Witnesses!