Port 6601
mstmg-sstp · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | mstmg-sstp |
| Registered | 2009-05-04 |
Frequently asked questions
What is port 6601 used for?
Port 6601 is registered with the IANA for mstmg-sstp (TCP/UDP). Description: Microsoft Threat Management Gateway SSTP; Reserved.
Is port 6601 a well-known port?
No. Port 6601 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 6601 is open?
Locally on Linux with ss -tulpn | grep ':6601\b', on Windows with netstat -ano | findstr :6601. To test a remote host use Test-NetConnection <host> -Port 6601 in PowerShell or nc -zv <host> 6601 on Linux/macOS.
How do I open port 6601 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 6601/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=6601/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 6601" -Direction Inbound -Protocol TCP -LocalPort 6601 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | mstmg-sstp | Microsoft Threat Management Gateway SSTP |
| UDP | – | Reserved |