Port 9990

osm-appsrvr · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Serviceosm-appsrvr
Registered2003-08

Frequently asked questions

What is port 9990 used for?

Port 9990 is registered with the IANA for osm-appsrvr (TCP/UDP). Description: OSM Applet Server.

Is port 9990 a well-known port?

No. Port 9990 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 9990 is open?

Locally on Linux with ss -tulpn | grep ':9990\b', on Windows with netstat -ano | findstr :9990. To test a remote host use Test-NetConnection <host> -Port 9990 in PowerShell or nc -zv <host> 9990 on Linux/macOS.

How do I open port 9990 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 9990/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9990/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9990" -Direction Inbound -Protocol TCP -LocalPort 9990 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPosm-appsrvrOSM Applet Server
UDPosm-appsrvrOSM Applet Server

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