Port 4785
cncp · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | cncp |
| Registered | 2009-04-01 |
Frequently asked questions
What is port 4785 used for?
Port 4785 is registered with the IANA for cncp (TCP/UDP). Description: Reserved; Cisco Nexus Control Protocol.
Is port 4785 a well-known port?
No. Port 4785 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 4785 is open?
Locally on Linux with ss -tulpn | grep ':4785\b', on Windows with netstat -ano | findstr :4785. To test a remote host use Test-NetConnection <host> -Port 4785 in PowerShell or nc -zv <host> 4785 on Linux/macOS.
How do I open port 4785 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 4785/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4785/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4785" -Direction Inbound -Protocol TCP -LocalPort 4785 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | – | Reserved |
| UDP | cncp | Cisco Nexus Control Protocol |