Port 1720

h323hostcall · SCTP/TCP/UDP

RangeRegistered port (1024–49151)
ProtocolSCTP/TCP/UDP
Serviceh323hostcall
Registered2014-07-30
Modified2013-01-31

Frequently asked questions

What is port 1720 used for?

Port 1720 is registered with the IANA for h323hostcall (SCTP/TCP/UDP). Description: H.323 Call Control Signalling; H.323 Call Control.

Is port 1720 a well-known port?

No. Port 1720 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 1720 is open?

Locally on Linux with ss -tulpn | grep ':1720\b', on Windows with netstat -ano | findstr :1720. To test a remote host use Test-NetConnection <host> -Port 1720 in PowerShell or nc -zv <host> 1720 on Linux/macOS.

How do I open port 1720 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1720/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1720/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1720" -Direction Inbound -Protocol TCP -LocalPort 1720 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPh323hostcallH.323 Call Control Signalling
UDPh323hostcallH.323 Call Control Signalling
SCTPh323hostcallH.323 Call Control

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