Port 711
cisco-tdp · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | cisco-tdp |
Frequently asked questions
What is port 711 used for?
Port 711 is registered with the IANA for cisco-tdp (TCP/UDP). Description: Cisco TDP.
Is port 711 a well-known port?
Yes. Port 711 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 711 is open?
Locally on Linux with ss -tulpn | grep ':711\b', on Windows with netstat -ano | findstr :711. To test a remote host use Test-NetConnection <host> -Port 711 in PowerShell or nc -zv <host> 711 on Linux/macOS.
How do I open port 711 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 711/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=711/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 711" -Direction Inbound -Protocol TCP -LocalPort 711 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | cisco-tdp | Cisco TDP |
| UDP | cisco-tdp | Cisco TDP |