Port 3603

int-rcv-cntrl · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceint-rcv-cntrl
Registered2002-09

Frequently asked questions

What is port 3603 used for?

Port 3603 is registered with the IANA for int-rcv-cntrl (TCP/UDP). Description: Integrated Rcvr Control.

Is port 3603 a well-known port?

No. Port 3603 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 3603 is open?

Locally on Linux with ss -tulpn | grep ':3603\b', on Windows with netstat -ano | findstr :3603. To test a remote host use Test-NetConnection <host> -Port 3603 in PowerShell or nc -zv <host> 3603 on Linux/macOS.

How do I open port 3603 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 3603/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=3603/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 3603" -Direction Inbound -Protocol TCP -LocalPort 3603 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPint-rcv-cntrlIntegrated Rcvr Control
UDPint-rcv-cntrlIntegrated Rcvr Control

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