Port 11720
h323callsigalt · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | h323callsigalt |
| Modified | 2013-01-31 |
Frequently asked questions
What is port 11720 used for?
Port 11720 is registered with the IANA for h323callsigalt (TCP/UDP). Description: H.323 Call Control Signalling Alternate.
Is port 11720 a well-known port?
No. Port 11720 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 11720 is open?
Locally on Linux with ss -tulpn | grep ':11720\b', on Windows with netstat -ano | findstr :11720. To test a remote host use Test-NetConnection <host> -Port 11720 in PowerShell or nc -zv <host> 11720 on Linux/macOS.
How do I open port 11720 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 11720/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=11720/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 11720" -Direction Inbound -Protocol TCP -LocalPort 11720 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | h323callsigalt | H.323 Call Control Signalling Alternate |
| UDP | h323callsigalt | H.323 Call Control Signalling Alternate |