Port 3753

nattyserver · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicenattyserver
Registered2003-04

Frequently asked questions

What is port 3753 used for?

Port 3753 is registered with the IANA for nattyserver (TCP/UDP). Description: NattyServer Port.

Is port 3753 a well-known port?

No. Port 3753 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3753 is open?

Locally on Linux with ss -tulpn | grep ':3753\b', on Windows with netstat -ano | findstr :3753. To test a remote host use Test-NetConnection <host> -Port 3753 in PowerShell or nc -zv <host> 3753 on Linux/macOS.

How do I open port 3753 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3753/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3753/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3753" -Direction Inbound -Protocol TCP -LocalPort 3753 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPnattyserverNattyServer Port
UDPnattyserverNattyServer Port

Nearby entries