Port 6421

nim-wan · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicenim-wan
Registered2006-02

Frequently asked questions

What is port 6421 used for?

Port 6421 is registered with the IANA for nim-wan (TCP/UDP). Description: NIM_WAN.

Is port 6421 a well-known port?

No. Port 6421 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 6421 is open?

Locally on Linux with ss -tulpn | grep ':6421\b', on Windows with netstat -ano | findstr :6421. To test a remote host use Test-NetConnection <host> -Port 6421 in PowerShell or nc -zv <host> 6421 on Linux/macOS.

How do I open port 6421 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 6421/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=6421/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 6421" -Direction Inbound -Protocol TCP -LocalPort 6421 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPnim-wanNIM_WAN
UDPnim-wanNIM_WAN

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