Port 4803
notateit and notateit-disc · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | notateit and notateit-disc |
| Registered | 2009-04-08 |
Frequently asked questions
What is port 4803 used for?
Port 4803 is registered with the IANA for notateit and notateit-disc (TCP/UDP). Description: Notateit Messaging; Notateit Messaging Discovery.
Is port 4803 a well-known port?
No. Port 4803 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4803 is open?
Locally on Linux with ss -tulpn | grep ':4803\b', on Windows with netstat -ano | findstr :4803. To test a remote host use Test-NetConnection <host> -Port 4803 in PowerShell or nc -zv <host> 4803 on Linux/macOS.
How do I open port 4803 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4803/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4803/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4803" -Direction Inbound -Protocol TCP -LocalPort 4803 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | notateit | Notateit Messaging |
| UDP | notateit-disc | Notateit Messaging Discovery |