Port 88 — Kerberos

TCP/UDP · Port 88 is used for the Kerberos protocol, a widely-used authentication mechanism that provides secure authentication and access control. This port is responsible for handling Kerberos ticket requests and responses, enabling secure communication between clients and servers.

Port Number: 88
Service Name: Kerberos
Protocol: TCP/UDP
Common Software: MIT Kerberos, Active Directory

Security Notes

Review IANA registry for port 88 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 88 used for?

Port 88 is used for Kerberos. Port 88 is used for the Kerberos protocol, a widely-used authentication mechanism that provides secure authentication and access control. This port is responsible for handling Kerberos ticket requests and responses, enabling secure communication between clients and servers. Common software: MIT Kerberos, Active Directory.

Is port 88 dangerous to leave open?

Review IANA registry for port 88 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 88 is open?

Use nmap: nmap -p 88 <target> or check locally: ss -tlnp | rg 88