Port 8501
cmtp-av and cmtp-mgt · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | cmtp-av and cmtp-mgt |
| Registered | 2011-04-29 |
Frequently asked questions
What is port 8501 used for?
Port 8501 is registered with the IANA for cmtp-av and cmtp-mgt (TCP/UDP). Description: CYTEL Message Transfer Management; CYTEL Message Transfer Audio and Video.
Is port 8501 a well-known port?
No. Port 8501 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 8501 is open?
Locally on Linux with ss -tulpn | grep ':8501\b', on Windows with netstat -ano | findstr :8501. To test a remote host use Test-NetConnection <host> -Port 8501 in PowerShell or nc -zv <host> 8501 on Linux/macOS.
How do I open port 8501 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 8501/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=8501/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 8501" -Direction Inbound -Protocol TCP -LocalPort 8501 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | cmtp-mgt | CYTEL Message Transfer Management |
| UDP | cmtp-av | CYTEL Message Transfer Audio and Video |