Port 5251

caevms · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicecaevms
Registered2004-11

Frequently asked questions

What is port 5251 used for?

Port 5251 is registered with the IANA for caevms (TCP/UDP). Description: CA eTrust VM Service.

Is port 5251 a well-known port?

No. Port 5251 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 5251 is open?

Locally on Linux with ss -tulpn | grep ':5251\b', on Windows with netstat -ano | findstr :5251. To test a remote host use Test-NetConnection <host> -Port 5251 in PowerShell or nc -zv <host> 5251 on Linux/macOS.

How do I open port 5251 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 5251/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=5251/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 5251" -Direction Inbound -Protocol TCP -LocalPort 5251 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPcaevmsCA eTrust VM Service
UDPcaevmsCA eTrust VM Service

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