Port 5303
hacl-probe · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | hacl-probe |
Frequently asked questions
What is port 5303 used for?
Port 5303 is registered with the IANA for hacl-probe (TCP/UDP). Description: HA cluster probing.
Is port 5303 a well-known port?
No. Port 5303 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 5303 is open?
Locally on Linux with ss -tulpn | grep ':5303\b', on Windows with netstat -ano | findstr :5303. To test a remote host use Test-NetConnection <host> -Port 5303 in PowerShell or nc -zv <host> 5303 on Linux/macOS.
How do I open port 5303 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 5303/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=5303/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 5303" -Direction Inbound -Protocol TCP -LocalPort 5303 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | hacl-probe | HA cluster probing |
| UDP | hacl-probe | HA cluster probing |