Port 6704

frc-hp · SCTP/TCP/UDP

RangeRegistered port (1024–49151)
ProtocolSCTP/TCP/UDP
Servicefrc-hp
ReferenceRFC 5811

Frequently asked questions

What is port 6704 used for?

Port 6704 is registered with the IANA for frc-hp (SCTP/TCP/UDP). Description: Reserved; ForCES HP (High Priority) channel.

Is port 6704 a well-known port?

No. Port 6704 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 6704 is open?

Locally on Linux with ss -tulpn | grep ':6704\b', on Windows with netstat -ano | findstr :6704. To test a remote host use Test-NetConnection <host> -Port 6704 in PowerShell or nc -zv <host> 6704 on Linux/macOS.

How do I open port 6704 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 6704/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=6704/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 6704" -Direction Inbound -Protocol TCP -LocalPort 6704 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
UDP–Reserved
TCP–Reserved
SCTPfrc-hpForCES HP (High Priority) channel

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