Port 4487

prex-tcp · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceprex-tcp
Registered2010-09-16

Frequently asked questions

What is port 4487 used for?

Port 4487 is registered with the IANA for prex-tcp (TCP/UDP). Description: Protocol for Remote Execution over TCP; Reserved.

Is port 4487 a well-known port?

No. Port 4487 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 4487 is open?

Locally on Linux with ss -tulpn | grep ':4487\b', on Windows with netstat -ano | findstr :4487. To test a remote host use Test-NetConnection <host> -Port 4487 in PowerShell or nc -zv <host> 4487 on Linux/macOS.

How do I open port 4487 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 4487/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=4487/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 4487" -Direction Inbound -Protocol TCP -LocalPort 4487 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPprex-tcpProtocol for Remote Execution over TCP
UDP–Reserved

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