Port 5903
ff-ice · SCTP/TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | SCTP/TCP/UDP |
| Service | ff-ice |
| Registered | 2022-06-03 |
Frequently asked questions
What is port 5903 used for?
Port 5903 is registered with the IANA for ff-ice (SCTP/TCP/UDP). Description: Flight & Flow Info for Collaborative Env.
Is port 5903 a well-known port?
No. Port 5903 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 5903 is open?
Locally on Linux with ss -tulpn | grep ':5903\b', on Windows with netstat -ano | findstr :5903. To test a remote host use Test-NetConnection <host> -Port 5903 in PowerShell or nc -zv <host> 5903 on Linux/macOS.
How do I open port 5903 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 5903/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=5903/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 5903" -Direction Inbound -Protocol TCP -LocalPort 5903 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | ff-ice | Flight & Flow Info for Collaborative Env |
| UDP | ff-ice | Flight & Flow Info for Collaborative Env |
| SCTP | ff-ice | Flight & Flow Info for Collaborative Env |