Port 19020
j-link · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | j-link |
Frequently asked questions
What is port 19020 used for?
Port 19020 is registered with the IANA for j-link (TCP/UDP). Description: J-Link TCP/IP Protocol; Reserved.
Is port 19020 a well-known port?
No. Port 19020 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 19020 is open?
Locally on Linux with ss -tulpn | grep ':19020\b', on Windows with netstat -ano | findstr :19020. To test a remote host use Test-NetConnection <host> -Port 19020 in PowerShell or nc -zv <host> 19020 on Linux/macOS.
How do I open port 19020 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 19020/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=19020/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 19020" -Direction Inbound -Protocol TCP -LocalPort 19020 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | j-link | J-Link TCP/IP Protocol |
| UDP | – | Reserved |