Port 69 — TFTP

UDP · Port 69/UDP is used for the Trivial File Transfer Protocol (TFTP), a lightweight file transfer protocol commonly used in network booting and firmware updates. TFTP is often used in situations where security is not a primary concern, making it a potential attack vector. As such, securing TFTP services is important to prevent unauthorized access.

Port Number: 69
Service Name: TFTP
Protocol: UDP
Common Software: tftpd, atftpd

Security Notes

Review IANA registry for port 69 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 69 used for?

Port 69 is used for TFTP. Port 69/UDP is used for the Trivial File Transfer Protocol (TFTP), a lightweight file transfer protocol commonly used in network booting and firmware updates. TFTP is often used in situations where security is not a primary concern, making it a potential attack vector. As such, securing TFTP services is important to prevent unauthorized access. Common software: tftpd, atftpd.

Is port 69 dangerous to leave open?

Review IANA registry for port 69 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 69 is open?

Use nmap: nmap -p 69 <target> or check locally: ss -tlnp | rg 69