Port 3868

diameter · SCTP/TCP/UDP

RangeRegistered port (1024–49151)
ProtocolSCTP/TCP/UDP
Servicediameter
ReferenceRFC 3588

Frequently asked questions

What is port 3868 used for?

Port 3868 is registered with the IANA for diameter (SCTP/TCP/UDP). Description: DIAMETER; Reserved.

Is port 3868 a well-known port?

No. Port 3868 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3868 is open?

Locally on Linux with ss -tulpn | grep ':3868\b', on Windows with netstat -ano | findstr :3868. To test a remote host use Test-NetConnection <host> -Port 3868 in PowerShell or nc -zv <host> 3868 on Linux/macOS.

How do I open port 3868 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3868/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3868/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3868" -Direction Inbound -Protocol TCP -LocalPort 3868 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPdiameterDIAMETER
UDP–Reserved
SCTPdiameterDIAMETER

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