Port 9081
cisco-aqos · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | cisco-aqos |
| Registered | 2017-10-27 |
Frequently asked questions
What is port 9081 used for?
Port 9081 is registered with the IANA for cisco-aqos (TCP/UDP). Description: Reserved; Required for Adaptive Quality of Service.
Is port 9081 a well-known port?
No. Port 9081 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 9081 is open?
Locally on Linux with ss -tulpn | grep ':9081\b', on Windows with netstat -ano | findstr :9081. To test a remote host use Test-NetConnection <host> -Port 9081 in PowerShell or nc -zv <host> 9081 on Linux/macOS.
How do I open port 9081 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 9081/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9081/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9081" -Direction Inbound -Protocol TCP -LocalPort 9081 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | – | Reserved |
| UDP | cisco-aqos | Required for Adaptive Quality of Service |