Port 1870

sunscalar-dns · TCP/UDP

RangeRegistered port (1024–49151)
ProtocolTCP/UDP
Servicesunscalar-dns

Frequently asked questions

What is port 1870 used for?

Port 1870 is registered with the IANA for sunscalar-dns (TCP/UDP). Description: SunSCALAR DNS Service.

Is port 1870 a well-known port?

No. Port 1870 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.

How do I check whether port 1870 is open?

Locally on Linux with ss -tulpn | grep ':1870\b', on Windows with netstat -ano | findstr :1870. To test a remote host use Test-NetConnection <host> -Port 1870 in PowerShell or nc -zv <host> 1870 on Linux/macOS.

How do I open port 1870 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 1870/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=1870/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 1870" -Direction Inbound -Protocol TCP -LocalPort 1870 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPsunscalar-dnsSunSCALAR DNS Service
UDPsunscalar-dnsSunSCALAR DNS Service

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