Port 2668

alarm-clock-c · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicealarm-clock-c

Frequently asked questions

What is port 2668 used for?

Port 2668 is registered with the IANA for alarm-clock-c (TCP/UDP). Description: Alarm Clock Client.

Is port 2668 a well-known port?

No. Port 2668 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 2668 is open?

Locally on Linux with ss -tulpn | grep ':2668\b', on Windows with netstat -ano | findstr :2668. To test a remote host use Test-NetConnection <host> -Port 2668 in PowerShell or nc -zv <host> 2668 on Linux/macOS.

How do I open port 2668 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 2668/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=2668/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 2668" -Direction Inbound -Protocol TCP -LocalPort 2668 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPalarm-clock-cAlarm Clock Client
UDPalarm-clock-cAlarm Clock Client

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