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Merge pull request clong#587 from masq/master
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HyperV: hyperv-create-nat-switch script refactor/adapter check updates
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clong authored Jan 11, 2021
2 parents 46d487a + b619569 commit 4a45443
Showing 1 changed file with 30 additions and 22 deletions.
52 changes: 30 additions & 22 deletions HyperV/hyperv-create-nat-switch.ps1
Original file line number Diff line number Diff line change
@@ -1,32 +1,40 @@
# See: https://www.petri.com/using-nat-virtual-switch-hyper-v

If ("NATSwitch" -in (Get-VMSwitch | Select-Object -ExpandProperty Name) -eq $FALSE) {
'Creating Internal-only switch named "NATSwitch" on Windows Hyper-V host...'
$NATHostIP = "192.168.38.1"
$NATNetPrefixLength = 24
$NATNet = "192.168.38.0/$NATNetPrefixLength"
$NATNetName = "NATNetwork"
$NATSwitchName = "NATSwitch"
$NATSwitchNameAlias = "vEthernet ($NATSwitchName)"

# Check our NAT switch exists, create it and configure it if it doesn't.
If ("$NATSwitchName" -in (Get-VMSwitch | Select-Object -ExpandProperty Name) -eq $FALSE) {
"Creating Internal-only switch named ""$NatSwitchName"" on Windows Hyper-V host..."

New-VMSwitch -SwitchName $NATSwitchName -SwitchType Internal
New-NetIPAddress -IPAddress $NATHostIP -PrefixLength $NATNetPrefixLength -InterfaceAlias $NATSwitchNameAlias
New-NetNAT -Name $NATNetName -InternalIPInterfaceAddressPrefix $NATNet

} else {
"""$NATSwitchName"" VM Switch on Hyper-V host for guest static IP configuration already exists; skipping..."
}

New-VMSwitch -SwitchName "NATSwitch" -SwitchType Internal
# Check that our Hyper-V host has the proper gateway address for the NAT Network.
If (@(Get-NetIPAddress | Where-Object {$_.IPAddress -eq "$NATHostIP" -and $_.InterfaceAlias -eq "$NATSwitchNameAlias"}).Count -eq 1) {
"Registering new IP address $NATHostIP on Windows Hyper-V host..."

New-NetIPAddress -IPAddress 192.168.38.1 -PrefixLength 24 -InterfaceAlias "vEthernet (NATSwitch)"
New-NetIPAddress -IPAddress $NATHostIP -PrefixLength $NATNetPrefixLength -InterfaceAlias $NATSwitchNameAlias

New-NetNAT -Name "NATNetwork" -InternalIPInterfaceAddressPrefix 192.168.38.0/24
}
else {
'"NATSwitch" for static IP configuration already exists; skipping'
} else {
"""$NATHostIP"" Hyper-V host gateway address for guest static IP configuration already registered; skipping..."
}

If ("192.168.38.1" -in (Get-NetIPAddress | Select-Object -ExpandProperty IPAddress) -eq $FALSE) {
'Registering new IP address 192.168.38.1 on Windows Hyper-V host...'

New-NetIPAddress -IPAddress 192.168.38.1 -PrefixLength 24 -InterfaceAlias "vEthernet (NATSwitch)"
}
else {
'"192.168.38.1" for static IP configuration already registered; skipping'
}
# Check that our Hyper-V host has the proper NAT Network setup
If ("$NATNet" -in (Get-NetNAT | Select-Object -ExpandProperty InternalIPInterfaceAddressPrefix) -eq $FALSE) {
"Registering new NAT adapter for $NATNet on Windows Hyper-V host..."

If ("192.168.38.0/24" -in (Get-NetNAT | Select-Object -ExpandProperty InternalIPInterfaceAddressPrefix) -eq $FALSE) {
'Registering new NAT adapter for 192.168.38.0/24 on Windows Hyper-V host...'
New-NetNAT -Name $NATNetName -InternalIPInterfaceAddressPrefix $NATNet

New-NetNAT -Name "NATNetwork" -InternalIPInterfaceAddressPrefix 192.168.38.0/24
}
else {
'"192.168.38.0/24" for static IP configuration already registered; skipping'
} else {
"""$NATNet"" Hyper-V host NAT Network for guest static IP configuration already registered; skipping"
}

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