Networking with Powershell

Test-Connection

Similar to ping

Test-Connection udemy.com
# Multiple Connexion
Test-Connection -ComputerName 8.8.8.8, 8.8.4.4
#  Add Delay between ping attempt
Test-Connection -ComputerName 8.8.8.8, 8.8.4.4 -Delay 5
#  Number of ping attempts
Test-Connection -ComputerName 8.8.8.8, 8.8.4.4 -Delay 5 - Count 2

Test-NetConnection

similar to test net-Connections but better output

Test-NetConnection udemy.com

Test-NetConnection udemy.com -InfomationLevel "Detailed"

#Populate a variable

$test = Test-NetConnection udemy.com -InfomationLevel "Detailed"
$test.PingReplyDetailed

TraceRoute

$test = Test-NetConnection udemy.com -TraceRoute
# Limit traceroute to 3 hops
$test = Test-NetConnection udemy.com -TraceRoute -Hops 3

Portscan

Test-NetConnection wikipedia.org -CommonTCPPort "http"

Test-NetConnection wikipedia.org -Port 80
Test-NetConnection wikipedia.org -Port 21

$ports = 22,80

$ports | forEach-Object {$port = $PSItem; if(Test-NetConnection udemy.com -Port $port -InformationLevel Quiet -WarningAction SilentlyContinue){Write-Host "Hey, $port is open !"} else { Write-Host "Hey, $port is closed ! "}}

Get-NetAdapter

To see the network adapter of the machine

Get-NetAdapter 

#nicer view
Get-NetAdapter | Format-List

$netAdapter = Get-NetAdapter
$netAdapter.MacAddress

Get-NetIPConfiguration

To access ip address of the machine

Get-NetIPConfiguration

$ipinfo = Get-NetIPConfiguration

$ipinfo[0].IPv4Address

Resolve-DnsName


Resolve-DnsName udemy.com

Resolve-DnsName udemy.com | Format-List

Get-DnsClientServerAddress

Get-DnsClientServerAddress -InterfaceAlias Ethernet
$dnsserv = Get-DnsClientServerAddress -InterfaceAlias Ethernet
$dnserv[0].ServerAddresses

Clear-DnsClientCache

The Clear-DnsClientCache cmdlet clears the local DNS resolver cache on a Windows system. This forces the computer to request fresh DNS information from its configured DNS servers, which is useful for troubleshooting name resolution issues or testing DNS changes. The cmdlet requires administrative privileges and only affects the local machine.

Clear-DnsClientCache

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