Port 4791
roce · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | roce |
| Registered | 2014-10-17 |
Frequently asked questions
What is port 4791 used for?
Port 4791 is registered with the IANA for roce (TCP/UDP). Description: IP Routable RocE; Reserved.
Is port 4791 a well-known port?
No. Port 4791 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4791 is open?
Locally on Linux with ss -tulpn | grep ':4791\b', on Windows with netstat -ano | findstr :4791. To test a remote host use Test-NetConnection <host> -Port 4791 in PowerShell or nc -zv <host> 4791 on Linux/macOS.
How do I open port 4791 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4791/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4791/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4791" -Direction Inbound -Protocol TCP -LocalPort 4791 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| UDP | roce | IP Routable RocE |
| TCP | – | Reserved |