Port 6251

tl1-raw-ssl · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicetl1-raw-ssl
Registered2008-01-29

Frequently asked questions

What is port 6251 used for?

Port 6251 is registered with the IANA for tl1-raw-ssl (TCP/UDP). Description: TL1 Raw Over SSL/TLS.

Is port 6251 a well-known port?

No. Port 6251 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 6251 is open?

Locally on Linux with ss -tulpn | grep ':6251\b', on Windows with netstat -ano | findstr :6251. To test a remote host use Test-NetConnection <host> -Port 6251 in PowerShell or nc -zv <host> 6251 on Linux/macOS.

How do I open port 6251 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 6251/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=6251/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 6251" -Direction Inbound -Protocol TCP -LocalPort 6251 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPtl1-raw-sslTL1 Raw Over SSL/TLS
UDPtl1-raw-sslTL1 Raw Over SSL/TLS

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