Port 2139
ias-auth · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | ias-auth |
Frequently asked questions
What is port 2139 used for?
Port 2139 is registered with the IANA for ias-auth (TCP/UDP). Description: IAS-AUTH.
Is port 2139 a well-known port?
No. Port 2139 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 2139 is open?
Locally on Linux with ss -tulpn | grep ':2139\b', on Windows with netstat -ano | findstr :2139. To test a remote host use Test-NetConnection <host> -Port 2139 in PowerShell or nc -zv <host> 2139 on Linux/macOS.
How do I open port 2139 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 2139/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2139/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2139" -Direction Inbound -Protocol TCP -LocalPort 2139 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | ias-auth | IAS-AUTH |
| UDP | ias-auth | IAS-AUTH |