Port 3959

treehopper · TCP/UDP

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

Frequently asked questions

What is port 3959 used for?

Port 3959 is registered with the IANA for treehopper (TCP/UDP). Description: Tree Hopper Networking.

Is port 3959 a well-known port?

No. Port 3959 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3959 is open?

Locally on Linux with ss -tulpn | grep ':3959\b', on Windows with netstat -ano | findstr :3959. To test a remote host use Test-NetConnection <host> -Port 3959 in PowerShell or nc -zv <host> 3959 on Linux/macOS.

How do I open port 3959 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3959/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3959/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3959" -Direction Inbound -Protocol TCP -LocalPort 3959 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPtreehopperTree Hopper Networking
UDPtreehopperTree Hopper Networking

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