Port 773
notify and submit · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | notify and submit |
Frequently asked questions
What is port 773 used for?
Port 773 is registered with the IANA for notify and submit (TCP/UDP). Description: .
Is port 773 a well-known port?
Yes. Port 773 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 773 is open?
Locally on Linux with ss -tulpn | grep ':773\b', on Windows with netstat -ano | findstr :773. To test a remote host use Test-NetConnection <host> -Port 773 in PowerShell or nc -zv <host> 773 on Linux/macOS.
How do I open port 773 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 773/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=773/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 773" -Direction Inbound -Protocol TCP -LocalPort 773 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | submit | |
| UDP | notify |