Port 398
kryptolan · TCP/UDP
| Range | System/well-known port (0–1023) |
|---|---|
| Protocol | TCP/UDP |
| Service | kryptolan |
Frequently asked questions
What is port 398 used for?
Port 398 is registered with the IANA for kryptolan (TCP/UDP). Description: Kryptolan.
Is port 398 a well-known port?
Yes. Port 398 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 398 is open?
Locally on Linux with ss -tulpn | grep ':398\b', on Windows with netstat -ano | findstr :398. To test a remote host use Test-NetConnection <host> -Port 398 in PowerShell or nc -zv <host> 398 on Linux/macOS.
How do I open port 398 in the firewall?
Ubuntu/Debian (ufw): sudo ufw allow 398/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=398/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 398" -Direction Inbound -Protocol TCP -LocalPort 398 -Action Allow.
IANA registry entries
| Protocol | Service | Description (IANA) |
|---|---|---|
| TCP | kryptolan | Kryptolan |
| UDP | kryptolan | Kryptolan |