Port 2107: BinTec Admin — The port that belongs to a router company you've probably never heard of

Port 2107 is registered with IANA under the service name bintec-admin, assigned to BinTec Communications — a German networking company that made enterprise routers and gateways, later acquired by Funkwerk AG.

If you're running BinTec hardware, this port may be active. If you're not, it almost certainly isn't — and shouldn't be.

What BinTec Is

BinTec Communications was a German manufacturer of ISDN routers and enterprise networking equipment, active through the 1990s and early 2000s. Their devices were common in European business networks during the ISDN era. Funkwerk AG acquired them in 2003, and the combined entity continued selling hardware under both names for years afterward. ¹

The bintec-admin assignment on port 2107 covers administrative access to these devices — configuration management, monitoring, and control functions specific to BinTec's proprietary management protocol.

The Registered Port Range

Port 2107 sits in the registered port range (1024–49151). This range is managed by IANA, and assignments here require a formal application process. Unlike the well-known ports below 1024 — where HTTP lives at 80 and HTTPS at 443 — registered ports are typically vendor-specific or application-specific.

The range is large enough that many assignments are narrow. Port 2107 is a good example: legitimately registered, used by a specific vendor's hardware, irrelevant to almost everyone else.

What's Actually on This Port

Unless you have BinTec or Funkwerk networking equipment on your network, nothing should be listening on port 2107. Citrix SmartAuditor has also been observed using this port for MSMQ management in some configurations, though this is incidental rather than an official assignment. ²

If you see unexpected activity here, it warrants investigation.

How to Check What's Listening

On Linux or macOS:

sudo ss -tlnp | grep 2107
# or
sudo lsof -i :2107

On Windows:

netstat -aon | findstr :2107

The process ID in the output will tell you exactly what's listening. Cross-reference it with Task Manager or ps aux to identify the application.

Why This Port Exists

Port 2107 is a reminder that the registered port range is a historical record, not a directory of things you'll actually encounter. IANA has assigned roughly 7,000 ports in this range. Many belong to products that are discontinued, companies that no longer exist, or protocols used only in narrow enterprise contexts.

The assignment system serves a real purpose — it prevents conflicts when that specific hardware or software actually shows up on a network. But the vast majority of registered ports are invisible in daily operation. Port 2107 is one of them.