PowerShell
Low risk
Test access to a TCP port with PowerShell
Checks if a server responds to a specific TCP port and displays useful network information.
$Serveur = "serveur.exemple.fr"
$Port = 443
Test-NetConnection -ComputerName $Serveur -Port $Port -InformationLevel DetailedWhen should you use it?
Use this when an application, website, VPN, or remote service appears to be unreachable.
What the script does
- Replace the server name and port number with the target you want to test.
- The TcpTestSucceeded property indicates whether the TCP connection succeeded.
- The result also shows the resolved IP address and the network interface used.
Precautions
- A failed test does not prove that the server is down: a firewall may be blocking the port.
- Test from more than one workstation or network before drawing a conclusion.
Rollback
No rollback is required: this command does not modify the system.