Port 684
corba-iiop-ssl · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | corba-iiop-ssl |
Frequently asked questions
What is port 684 used for?
Port 684 is registered with the IANA for corba-iiop-ssl (TCP/UDP). Description: CORBA IIOP SSL.
Is port 684 a well-known port?
Yes. Port 684 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 684 is open?
Locally on Linux with ss -tulpn | grep ':684\b', on Windows with netstat -ano | findstr :684. To test a remote host use Test-NetConnection <host> -Port 684 in PowerShell or nc -zv <host> 684 on Linux/macOS.
How do I open port 684 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 684/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=684/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 684" -Direction Inbound -Protocol TCP -LocalPort 684 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | corba-iiop-ssl | CORBA IIOP SSL |
| UDP | corba-iiop-ssl | CORBA IIOP SSL |