Port 15
no service name · TCP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP |
| Service | no service name |
Frequently asked questions
What is port 15 used for?
Port 15 is registered with the IANA for no service name (TCP). Description: Unassigned [was netstat].
Is port 15 a well-known port?
Yes. Port 15 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 15 is open?
Locally on Linux with ss -tulpn | grep ':15\b', on Windows with netstat -ano | findstr :15. To test a remote host use Test-NetConnection <host> -Port 15 in PowerShell or nc -zv <host> 15 on Linux/macOS.
How do I open port 15 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 15/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=15/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 15" -Direction Inbound -Protocol TCP -LocalPort 15 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | – | Unassigned [was netstat] |