Port 1556

veritas-pbx and veritas_pbx · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceveritas-pbx and veritas_pbx
Registered2004-04

Frequently asked questions

What is port 1556 used for?

Port 1556 is registered with the IANA for veritas-pbx and veritas_pbx (TCP/UDP). Description: VERITAS Private Branch Exchange IANA assigned this well-formed service name as a replacement for "veritas_pbx".; VERITAS Private Branch Exchange.

Is port 1556 a well-known port?

No. Port 1556 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 1556 is open?

Locally on Linux with ss -tulpn | grep ':1556\b', on Windows with netstat -ano | findstr :1556. To test a remote host use Test-NetConnection <host> -Port 1556 in PowerShell or nc -zv <host> 1556 on Linux/macOS.

How do I open port 1556 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1556/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1556/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1556" -Direction Inbound -Protocol TCP -LocalPort 1556 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPveritas-pbxVERITAS Private Branch Exchange IANA assigned this well-formed service name as a replacement for "veritas_pbx".
TCPveritas_pbxVERITAS Private Branch Exchange
UDPveritas-pbxVERITAS Private Branch Exchange IANA assigned this well-formed service name as a replacement for "veritas_pbx".
UDPveritas_pbxVERITAS Private Branch Exchange

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