Question

Which of the following ports would you close if your server does not host any DNS services?

1) 22
2) 53
3) 443
4) 80

Answer 1

If your server does not provide DNS services, you should close port 53. Port 53 is designated for DNS resolutions, and its closure helps enhance server security by preventing unwanted DNS traffic.

Step-by-step explanation:

If your server does not host any DNS services, you would close port 53. This port is specifically used for DNS resolutions, where domain names are translated into IP addresses. The other ports mentioned serve different purposes:

• Port 22: Used for SSH (Secure Shell) for secure logins, file transfers, and port forwarding.
• Port 443: Used for HTTPS (HyperText Transfer Protocol Secure) for secure communications over a computer network.
• Port 80: Used for HTTP (HyperText Transfer Protocol) for standard web traffic.

Closing port 53 can help prevent unwanted DNS traffic if your server does not need to handle DNS requests, thus enhancing the security of your server.