Port 1989

mshnet and tr-rsrb-p3 · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicemshnet and tr-rsrb-p3

Frequently asked questions

What is port 1989 used for?

Port 1989 is registered with the IANA for mshnet and tr-rsrb-p3 (TCP/UDP). Description: cisco RSRB Priority 3 port; MHSnet system.

Is port 1989 a well-known port?

No. Port 1989 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 1989 is open?

Locally on Linux with ss -tulpn | grep ':1989\b', on Windows with netstat -ano | findstr :1989. To test a remote host use Test-NetConnection <host> -Port 1989 in PowerShell or nc -zv <host> 1989 on Linux/macOS.

How do I open port 1989 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1989/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1989/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1989" -Direction Inbound -Protocol TCP -LocalPort 1989 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPtr-rsrb-p3cisco RSRB Priority 3 port
UDPtr-rsrb-p3cisco RSRB Priority 3 port
TCPmshnetMHSnet system
UDPmshnetMHSnet system

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