Port 2421
g-talk · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | g-talk |
Frequently asked questions
What is port 2421 used for?
Port 2421 is registered with the IANA for g-talk (TCP/UDP). Description: G-Talk.
Is port 2421 a well-known port?
No. Port 2421 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 2421 is open?
Locally on Linux with ss -tulpn | grep ':2421\b', on Windows with netstat -ano | findstr :2421. To test a remote host use Test-NetConnection <host> -Port 2421 in PowerShell or nc -zv <host> 2421 on Linux/macOS.
How do I open port 2421 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 2421/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2421/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2421" -Direction Inbound -Protocol TCP -LocalPort 2421 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | g-talk | G-Talk |
| UDP | g-talk | G-Talk |