Port 753
rrh · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | rrh |
Frequently asked questions
What is port 753 used for?
Port 753 is registered with the IANA for rrh (TCP/UDP). Description: .
Is port 753 a well-known port?
Yes. Port 753 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 753 is open?
Locally on Linux with ss -tulpn | grep ':753\b', on Windows with netstat -ano | findstr :753. To test a remote host use Test-NetConnection <host> -Port 753 in PowerShell or nc -zv <host> 753 on Linux/macOS.
How do I open port 753 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 753/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=753/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 753" -Direction Inbound -Protocol TCP -LocalPort 753 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | rrh | |
| UDP | rrh |