Port 3128 — Squid proxy
Quick reference for TCP/UDP port 3128, used by Squid proxy. Includes what the service does, security guidance and related ports.
Port
3128
Protocol
TCP
Service
Squid proxy
What is port 3128?
Squid HTTP proxy.
What port does Squid proxy use?
Squid proxy listens on port 3128 by default.
Security guidance
Medium risk — open with care
Port 3128 (Squid proxy) 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.
Related ports
Frequently asked
What is port 3128 used for?+
Port 3128 is the standard TCP/UDP port for Squid proxy. Squid HTTP proxy.
What port does Squid proxy use?+
Squid proxy listens on port 3128 by default.
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