Port 1999

tcp-id-port · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicetcp-id-port

Frequently asked questions

What is port 1999 used for?

Port 1999 is registered with the IANA for tcp-id-port (TCP/UDP). Description: cisco identification port.

Is port 1999 a well-known port?

No. Port 1999 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 1999 is open?

Locally on Linux with ss -tulpn | grep ':1999\b', on Windows with netstat -ano | findstr :1999. To test a remote host use Test-NetConnection <host> -Port 1999 in PowerShell or nc -zv <host> 1999 on Linux/macOS.

How do I open port 1999 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1999/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1999/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1999" -Direction Inbound -Protocol TCP -LocalPort 1999 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPtcp-id-portcisco identification port
UDPtcp-id-portcisco identification port

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