FixWslInternet.ps1

# Скрипт Чинит отвалившующся сеть WSL
# Запускаем от имени администратора.
Write-Output "---------------------- FIX WSL INTERNET ----------------------"

# 1. Завершаем все дистрибутивы WSL
Write-Output "Shutting down WSL..."
wsl --shutdown

# $wslEnthernetAdapterName = "vEthernet (WSL)"
# $wslEnthernetAdapterName = "vEthernet (WSL (Hyper-V firewall))"
Write-Output "Detecting WSL adapter..."
$adapter = Get-NetAdapter | Where-Object {
   $_.InterfaceDescription -like "*WSL*" -or
   $_.Name -like "*WSL*"
} | Select-Object -First 1

if ($adapter) {
   $wslEnthernetAdapterName = $adapter.Name;
   Write-Output "adapter: ${wslEnthernetAdapterName}";
}
else {
   throw "WSL сетевой адаптер не найден"
}


# 2. Определяем подсеть адаптера "vEthernet (WSL)"
Write-Output "Detecting WSL network..."
$ifconfig = Get-NetIPAddress -InterfaceAlias $wslEnthernetAdapterName -AddressFamily IPv4
if (-not $ifconfig) {
   Write-Error "Не найден интерфейс vEthernet (WSL). Проверь, что WSL установлен и запущен хотя бы раз."
   exit 1
}

$ip_text = $ifconfig.IPAddress;
Write-Output "IP: $ip_text"

$prefix = $ifconfig.PrefixLength
$ip = $ifconfig[0].IPAddress.Trim()
$octets = $ip -split '\.'
$networkBase = ($octets[0..2] -join '.') + ".0"

$baseIp = [System.Net.IPAddress]::Parse($networkBase)
$subnet = "$($baseIp)/$prefix"

Write-Output "WSL subnet detected: $subnet"

if (1) {
   # 3. Восстанавливаем NAT
   $natName = "WSL"
   Write-Output "Re-creating NAT rule..."
   Remove-NetNat -Name $natName -Confirm:$false -ErrorAction SilentlyContinue
   New-NetNat -Name $natName -InternalIPInterfaceAddressPrefix $subnet

   # 4. Перезапуск WinNAT
   Write-Output "Restarting WinNAT..."
   net stop winnat
   net start winnat
}
Write-Output "---------------------- DONE ----------------------"