Port 34963

profinet-rtm · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceprofinet-rtm
Registered2004-11
Modified2026-03-16

Frequently asked questions

What is port 34963 used for?

Port 34963 is registered with the IANA for profinet-rtm (TCP/UDP). Description: PROFInet RT Multicast.

Is port 34963 a well-known port?

No. Port 34963 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 34963 is open?

Locally on Linux with ss -tulpn | grep ':34963\b', on Windows with netstat -ano | findstr :34963. To test a remote host use Test-NetConnection <host> -Port 34963 in PowerShell or nc -zv <host> 34963 on Linux/macOS.

How do I open port 34963 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 34963/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=34963/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 34963" -Direction Inbound -Protocol TCP -LocalPort 34963 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPprofinet-rtmPROFInet RT Multicast
UDPprofinet-rtmPROFInet RT Multicast

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