Port 210
z39-50 and z39.50 · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | z39-50 and z39.50 |
Frequently asked questions
What is port 210 used for?
Port 210 is registered with the IANA for z39-50 and z39.50 (TCP/UDP). Description: ANSI Z39.50 IANA assigned this well-formed service name as a replacement for "z39.50".; ANSI Z39.50.
Is port 210 a well-known port?
Yes. Port 210 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 210 is open?
Locally on Linux with ss -tulpn | grep ':210\b', on Windows with netstat -ano | findstr :210. To test a remote host use Test-NetConnection <host> -Port 210 in PowerShell or nc -zv <host> 210 on Linux/macOS.
How do I open port 210 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 210/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=210/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 210" -Direction Inbound -Protocol TCP -LocalPort 210 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | z39-50 | ANSI Z39.50 IANA assigned this well-formed service name as a replacement for "z39.50". |
| TCP | z39.50 | ANSI Z39.50 |
| UDP | z39-50 | ANSI Z39.50 IANA assigned this well-formed service name as a replacement for "z39.50". |
| UDP | z39.50 | ANSI Z39.50 |