Port 8081 — HTTP alt
Quick reference for TCP/UDP port 8081, used by HTTP alt. Includes what the service does, security guidance and related ports.
Port
8081
Protocol
TCP
Service
HTTP alt
What is port 8081?
Alternate HTTP, often paired with 8080.
What port does HTTP alt use?
HTTP alt listens on port 8081 by default.
Security guidance
Medium risk — open with care
Port 8081 (HTTP alt) 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 8081 used for?+
Port 8081 is the standard TCP/UDP port for HTTP alt. Alternate HTTP, often paired with 8080.
What port does HTTP alt use?+
HTTP alt listens on port 8081 by default.
PROTECT YOUR PRIVACY
Your IP Address Is Exposed Right Now
Every website you visit can see your real IP address and location. NordVPN encrypts your traffic and hides your identity with military-grade encryption. Stay anonymous online.
Get NordVPN — 73% Off30-day money-back guarantee