Port 623
asf-rmcp and oob-ws-http · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | asf-rmcp and oob-ws-http |
| Registered | 2007-06 |
Frequently asked questions
What is port 623 used for?
Port 623 is registered with the IANA for asf-rmcp and oob-ws-http (TCP/UDP). Description: DMTF out-of-band web services management protocol; ASF Remote Management and Control Protocol.
Is port 623 a well-known port?
Yes. Port 623 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 623 is open?
Locally on Linux with ss -tulpn | grep ':623\b', on Windows with netstat -ano | findstr :623. To test a remote host use Test-NetConnection <host> -Port 623 in PowerShell or nc -zv <host> 623 on Linux/macOS.
How do I open port 623 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 623/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=623/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 623" -Direction Inbound -Protocol TCP -LocalPort 623 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | oob-ws-http | DMTF out-of-band web services management protocol |
| UDP | asf-rmcp | ASF Remote Management and Control Protocol |