Port 490
micom-pfs · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | micom-pfs |
Frequently asked questions
What is port 490 used for?
Port 490 is registered with the IANA for micom-pfs (TCP/UDP). Description: micom-pfs.
Is port 490 a well-known port?
Yes. Port 490 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.
How do I check whether port 490 is open?
Locally on Linux with ss -tulpn | grep ':490\b', on Windows with netstat -ano | findstr :490. To test a remote host use Test-NetConnection <host> -Port 490 in PowerShell or nc -zv <host> 490 on Linux/macOS.
How do I open port 490 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 490/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=490/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 490" -Direction Inbound -Protocol TCP -LocalPort 490 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | micom-pfs | micom-pfs |
| UDP | micom-pfs | micom-pfs |