Port 9400
sec-t4net-srv · TCP/UDP
| Range | Registered port (1024–49151) |
|---|---|
| Protocol | TCP/UDP |
| Service | sec-t4net-srv |
| Registered | 2007-02 |
Frequently asked questions
What is port 9400 used for?
Port 9400 is registered with the IANA for sec-t4net-srv (TCP/UDP). Description: Samsung Twain for Network Server.
Is port 9400 a well-known port?
No. Port 9400 is in the range 1024–49151 (registered or user ports). Ordinary programs may open it without root privileges.
How do I check whether port 9400 is open?
Locally on Linux with ss -tulpn | grep ':9400\b', on Windows with netstat -ano | findstr :9400. To test a remote host use Test-NetConnection <host> -Port 9400 in PowerShell or nc -zv <host> 9400 on Linux/macOS.
How do I open port 9400 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 9400/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=9400/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 9400" -Direction Inbound -Protocol TCP -LocalPort 9400 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | sec-t4net-srv | Samsung Twain for Network Server |
| UDP | sec-t4net-srv | Samsung Twain for Network Server |