First, most (but not all) DNS servers sequentially assign the ports they use in making DNS queries. That is, they start with 58363, then use 58364, and so on, incrementing by one.

DNS is a name resolution protocol that is used to convert a hostname, such as www.example.com, to its IP addresses, 93.184.216.34, so that software can connect to the remote computer.

Attacks leveraging DNS protocols used to be fairly predictable and limited to the occasional DDoS floods. Now attackers use more than a dozen , including cache poisoning, tunneling and domain ...

Finally, DNS Tunnelling can be used to target DNS. The DNS protocol – operating on UDP port 53 for normal requests – is used as a means of “tunnelling” through security systems to steal data.

Over 100,000 devices have a misconfigured service called multicast DNS that accepts requests from the Internet and can potentially be abused to amplify distributed denial-of-service (DDoS) attacks.

Block third-party DNS services Companies are suggested to use their own enterprise-operated DNS servers or externally hosted services with built-in support for encrypted DNS requests such as DoH.

First, most (but not all) DNS servers sequentially assign the ports they use in making DNS queries. That is, they start with 58363, then use 58364, and so on, incrementing by one.