Port 6343

sflow · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicesflow
Registered2003-06

Frequently asked questions

What is port 6343 used for?

Port 6343 is registered with the IANA for sflow (TCP/UDP). Description: sFlow traffic monitoring.

Is port 6343 a well-known port?

No. Port 6343 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 6343 is open?

Locally on Linux with ss -tulpn | grep ':6343\b', on Windows with netstat -ano | findstr :6343. To test a remote host use Test-NetConnection <host> -Port 6343 in PowerShell or nc -zv <host> 6343 on Linux/macOS.

How do I open port 6343 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 6343/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=6343/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 6343" -Direction Inbound -Protocol TCP -LocalPort 6343 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPsflowsFlow traffic monitoring
UDPsflowsFlow traffic monitoring

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