Test-NetConnection

In the absence of Nmap on a Windows PC, Test-NetConnection can serve as an alternative

Test-NetConnection is a PowerShell cmdlet in Windows that enables network-related testing and diagnostics. It allows users to check connectivity, test ports, and perform various network-related tasks directly from the PowerShell command line.

Usage:

Test-NetConnection [-ComputerName] <String> [-Port <Int32>] [-InformationLevel <InformationLevel>]

Key Parameters:

• -ComputerName: Specifies the target host or IP address to test connectivity.

• -Port: Specifies the target port number to test. If not provided, a default port is used.

• -InformationLevel: Specifies the level of detail in the output.

Common Scenarios:

1. Basic Connectivity Test:

   Test-NetConnection -ComputerName example.com

   Performs a basic connectivity test to the specified host.

2. Port Test:

   Test-NetConnection -ComputerName example.com -Port 80

   Tests connectivity to a specific port on the target host.

3. Detailed Output:

   Test-NetConnection -ComputerName example.com -Port 443 -InformationLevel Detailed

   Provides detailed information about the connection, including source and destination IP addresses.

Examples:

• Basic connectivity test to example.com:

  Test-NetConnection -ComputerName example.com

• Test connectivity to port 80 on example.com:

  Test-NetConnection -ComputerName example.com -Port 80

• Detailed output for port 443 on example.com:

  Test-NetConnection -ComputerName example.com -Port 443 -InformationLevel Detailed

Resources:

• https://learn.microsoft.com/en-us/powershell/module/nettcpip/test-netconnection?view=windowsserver2022-ps