Port 7901

tnos-sp · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicetnos-sp
Registered2005-08

Frequently asked questions

What is port 7901 used for?

Port 7901 is registered with the IANA for tnos-sp (TCP/UDP). Description: TNOS Service Protocol.

Is port 7901 a well-known port?

No. Port 7901 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 7901 is open?

Locally on Linux with ss -tulpn | grep ':7901\b', on Windows with netstat -ano | findstr :7901. To test a remote host use Test-NetConnection <host> -Port 7901 in PowerShell or nc -zv <host> 7901 on Linux/macOS.

How do I open port 7901 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 7901/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=7901/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 7901" -Direction Inbound -Protocol TCP -LocalPort 7901 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPtnos-spTNOS Service Protocol
UDPtnos-spTNOS Service Protocol

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