Port 9911
sype-transport · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | sype-transport |
| Registered | 2003-03 |
Frequently asked questions
What is port 9911 used for?
Port 9911 is registered with the IANA for sype-transport (TCP/UDP). Description: SYPECom Transport Protocol.
Is port 9911 a well-known port?
No. Port 9911 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 9911 is open?
Locally on Linux with ss -tulpn | grep ':9911\b', on Windows with netstat -ano | findstr :9911. To test a remote host use Test-NetConnection <host> -Port 9911 in PowerShell or nc -zv <host> 9911 on Linux/macOS.
How do I open port 9911 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 9911/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9911/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9911" -Direction Inbound -Protocol TCP -LocalPort 9911 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | sype-transport | SYPECom Transport Protocol |
| UDP | sype-transport | SYPECom Transport Protocol |