Port 520 — RIP
Quick reference for TCP/UDP port 520, used by RIP. Includes what the service does, security guidance and related ports.
What is port 520?
Routing Information Protocol.
What port does RIP use?
RIP listens on port 520 by default.
Is port 520 open? How to check
Run one of these from your computer, replacing HOST with the IP address or domain you want to test.
nc -zvu HOST 520
Test-NetConnection HOST -Port 520
nmap -sU -p 520 HOST
A refused or timed-out connection means the port is closed or filtered by a firewall.
Security guidance
Medium risk — open with care
Port 520 (RIP) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Frequently asked
What is port 520 used for?+
Port 520 is the standard TCP/UDP port for RIP. Routing Information Protocol.
What port does RIP use?+
RIP listens on port 520 by default.
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