Port 34966
profinet-rt-sec · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | profinet-rt-sec |
| Registered | 2026-03-10 |
Frequently asked questions
What is port 34966 used for?
Port 34966 is registered with the IANA for profinet-rt-sec (TCP/UDP). Description: Reserved; PROFINET secure real-time data transfer over UDP (unicast and multicast).
Is port 34966 a well-known port?
No. Port 34966 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 34966 is open?
Locally on Linux with ss -tulpn | grep ':34966\b', on Windows with netstat -ano | findstr :34966. To test a remote host use Test-NetConnection <host> -Port 34966 in PowerShell or nc -zv <host> 34966 on Linux/macOS.
How do I open port 34966 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 34966/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=34966/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 34966" -Direction Inbound -Protocol TCP -LocalPort 34966 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | – | Reserved |
| UDP | profinet-rt-sec | PROFINET secure real-time data transfer over UDP (unicast and multicast) |