Port 3631

cs-services · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicecs-services
Registered2002-10

Frequently asked questions

What is port 3631 used for?

Port 3631 is registered with the IANA for cs-services (TCP/UDP). Description: C&S Web Services Port.

Is port 3631 a well-known port?

No. Port 3631 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3631 is open?

Locally on Linux with ss -tulpn | grep ':3631\b', on Windows with netstat -ano | findstr :3631. To test a remote host use Test-NetConnection <host> -Port 3631 in PowerShell or nc -zv <host> 3631 on Linux/macOS.

How do I open port 3631 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3631/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3631/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3631" -Direction Inbound -Protocol TCP -LocalPort 3631 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPcs-servicesC&S Web Services Port
UDPcs-servicesC&S Web Services Port

Nearby entries