I am receiving UDP attack on port 53 for reference snapshot is attached right now for this i am using drop rule but problem is that my router is continuously dropping packets since last night and still doing this i dont know why this attack is not finished yet and what kind of attack is this?
It’s just an DDoS attack. The attacker sends DNS Request, that are resolved by your router. This results in big traffic for the target Machine, so the machine that is SOA of the DNS target (hundreds of this open resolvers get used for this).