Port 1313: BMC Patrol / Hugo — When official assignments meet reality

What Runs on This Port

Port 1313 has two identities:

Official: BMC_PATROLDB — registered with IANA for BMC Patrol's database service¹

Actual: Hugo development server — the default port for one of the world's most popular static site generators²

If you see port 1313 in use on a developer's machine, it's almost certainly Hugo. The official assignment exists, but Hugo claimed this port in practice.

The Registered Ports Range

Port 1313 falls in the registered ports range (1024-49151). IANA maintains a registry of services that have requested specific ports in this range, but enforcement is loose. Any application can bind to these ports—the registry is more guidance than law.

This is why collisions happen. BMC registered 1313 for their database service. Hugo chose 1313 as their default. Both are "correct" according to how the system actually works.

Hugo's Takeover

When you run hugo server, it starts a local web server on port 1313 by default³. The server watches your content files and rebuilds your site in milliseconds, refreshing your browser automatically.

hugo server
# Starts at http://localhost:1313/

Hugo chose 1313 because it's memorable and rarely conflicts with other services in typical development environments. The fact that it was officially assigned to something else didn't matter—registered ports aren't enforced.

Thousands of developers start Hugo servers on 1313 every day. The unofficial use has completely overshadowed the official one.

Why This Port Assignment Matters

Port 1313 demonstrates something important about how the Internet actually works versus how it's supposed to work:

In theory: IANA registers ports, services respect assignments, conflicts are rare.

In practice: Applications choose convenient port numbers, official assignments are often ignored, and real-world usage defines what a port "means."

The registered ports range (1024-49151) is a registry, not a reservation system. When Hugo picked 1313, they weren't breaking any rules—they were just picking a number that worked for them. The fact that BMC Patrol technically owned it didn't stop them.

Checking What's Listening

To see if something is using port 1313 on your system:

Linux/macOS:

lsof -i :1313
# Or
netstat -an | grep 1313

Windows:

netstat -ano | findstr :1313

If you find a process on 1313 and you're not running Hugo, you might have found one of the rare machines where BMC Patrol is actually using its officially assigned port. Or another application that picked the same convenient number.

The Gap Between Registry and Reality

The existence of port 1313 as both "BMC Patrol's database port" and "Hugo's development port" reveals the informal nature of the registered ports system. Official assignments exist. Real-world usage does what it wants. The Internet continues functioning regardless.

For developers, 1313 means Hugo. For network administrators at companies running BMC Patrol, it means something else entirely. Both are right. Neither is wrong. The port does what you tell it to do, not what IANA says it should do.