Port 1233

univ-appserver · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceuniv-appserver

Frequently asked questions

What is port 1233 used for?

Port 1233 is registered with the IANA for univ-appserver (TCP/UDP). Description: Universal App Server.

Is port 1233 a well-known port?

No. Port 1233 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 1233 is open?

Locally on Linux with ss -tulpn | grep ':1233\b', on Windows with netstat -ano | findstr :1233. To test a remote host use Test-NetConnection <host> -Port 1233 in PowerShell or nc -zv <host> 1233 on Linux/macOS.

How do I open port 1233 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1233/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1233/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1233" -Direction Inbound -Protocol TCP -LocalPort 1233 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPuniv-appserverUniversal App Server
UDPuniv-appserverUniversal App Server

Nearby entries