Port 990
ftps · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | ftps |
Frequently asked questions
What is port 990 used for?
Port 990 is registered with the IANA for ftps (TCP/UDP). Description: ftp protocol, control, over TLS/SSL.
Is port 990 a well-known port?
Yes. Port 990 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 990 is open?
Locally on Linux with ss -tulpn | grep ':990\b', on Windows with netstat -ano | findstr :990. To test a remote host use Test-NetConnection <host> -Port 990 in PowerShell or nc -zv <host> 990 on Linux/macOS.
How do I open port 990 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 990/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=990/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 990" -Direction Inbound -Protocol TCP -LocalPort 990 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | ftps | ftp protocol, control, over TLS/SSL |
| UDP | ftps | ftp protocol, control, over TLS/SSL |