Port 205
at-5 · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | at-5 |
Frequently asked questions
What is port 205 used for?
Port 205 is registered with the IANA for at-5 (TCP/UDP). Description: AppleTalk Unused.
Is port 205 a well-known port?
Yes. Port 205 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 205 is open?
Locally on Linux with ss -tulpn | grep ':205\b', on Windows with netstat -ano | findstr :205. To test a remote host use Test-NetConnection <host> -Port 205 in PowerShell or nc -zv <host> 205 on Linux/macOS.
How do I open port 205 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 205/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=205/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 205" -Direction Inbound -Protocol TCP -LocalPort 205 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | at-5 | AppleTalk Unused |
| UDP | at-5 | AppleTalk Unused |