Port 953
rndc · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | rndc |
| Registered | 2017-06-08 |
Frequently asked questions
What is port 953 used for?
Port 953 is registered with the IANA for rndc (TCP/UDP). Description: BIND9 remote name daemon controller; Reserved.
Is port 953 a well-known port?
Yes. Port 953 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 953 is open?
Locally on Linux with ss -tulpn | grep ':953\b', on Windows with netstat -ano | findstr :953. To test a remote host use Test-NetConnection <host> -Port 953 in PowerShell or nc -zv <host> 953 on Linux/macOS.
How do I open port 953 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 953/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=953/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 953" -Direction Inbound -Protocol TCP -LocalPort 953 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | rndc | BIND9 remote name daemon controller |
| UDP | – | Reserved |