Port 49
tacacs · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | tacacs |
Frequently asked questions
What is port 49 used for?
Port 49 is registered with the IANA for tacacs (TCP/UDP). Description: Login Host Protocol (TACACS).
Is port 49 a well-known port?
Yes. Port 49 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 49 is open?
Locally on Linux with ss -tulpn | grep ':49\b', on Windows with netstat -ano | findstr :49. To test a remote host use Test-NetConnection <host> -Port 49 in PowerShell or nc -zv <host> 49 on Linux/macOS.
How do I open port 49 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 49/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=49/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 49" -Direction Inbound -Protocol TCP -LocalPort 49 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | tacacs | Login Host Protocol (TACACS) |
| UDP | tacacs | Login Host Protocol (TACACS) |