Port 208

at-8 · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Serviceat-8

Frequently asked questions

What is port 208 used for?

Port 208 is registered with the IANA for at-8 (TCP/UDP). Description: AppleTalk Unused.

Is port 208 a well-known port?

Yes. Port 208 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 208 is open?

Locally on Linux with ss -tulpn | grep ':208\b', on Windows with netstat -ano | findstr :208. To test a remote host use Test-NetConnection <host> -Port 208 in PowerShell or nc -zv <host> 208 on Linux/macOS.

How do I open port 208 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 208/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=208/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 208" -Direction Inbound -Protocol TCP -LocalPort 208 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPat-8AppleTalk Unused
UDPat-8AppleTalk Unused

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