Port 18104
radpdf · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | radpdf |
| Registered | 2010-10-15 |
Frequently asked questions
What is port 18104 used for?
Port 18104 is registered with the IANA for radpdf (TCP/UDP). Description: RAD PDF Service; Reserved.
Is port 18104 a well-known port?
No. Port 18104 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 18104 is open?
Locally on Linux with ss -tulpn | grep ':18104\b', on Windows with netstat -ano | findstr :18104. To test a remote host use Test-NetConnection <host> -Port 18104 in PowerShell or nc -zv <host> 18104 on Linux/macOS.
How do I open port 18104 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 18104/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=18104/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 18104" -Direction Inbound -Protocol TCP -LocalPort 18104 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | radpdf | RAD PDF Service |
| UDP | – | Reserved |