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DHCP servers, list for this domain

Get-DhcpServerInDC

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firewall ports - see ports, firewall

firewall, configure for domains and trusts

are ports 53, 135, 445 & 3268 enabled?

Get-NetFirewallPortFilter -PolicyStore ActiveStore `
    | ? {($_.LocalPort -eq '53') -or ($_.LocalPort -eq '135') -or ($_.LocalPort -eq '389') -or ($_.LocalPort -eq '445') -or ($_.LocalPort -eq '3268 ')} `
    | Sort-Object LocalPort, Protocol | Format-Table -Property *

or more simply:

Get-NetFirewallPortFilter -PolicyStore ActiveStore `
    | ? {($_.LocalPort -eq '53') -or ($_.LocalPort -eq '135') -or ($_.LocalPort -eq '389') -or ($_.LocalPort -eq '445') -or ($_.LocalPort -eq '3268')} `
    | Sort-Object LocalPort, Protocol | Format-Table Protocol, LocalPort, InstanceID

But not sure this is the right approach. This seems more centered on services rather than ports...

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ports, established (used)

Get-NetTCPConnection -State Established

seems to sort descending by LocalPort

ports, firewall

Get-NetFirewallPortFilter -PolicyStore ActiveStore | ? {$_.LocalPort -ne 'any'} | Sort-Object LocalPort, Protocol | Format-Table -Property *

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