Powershell-Code to force a reconnect on an AVM Fritz.Box

gistfile1.txt

# reset Internet-Connection on fritz.box to get a new public IP:

cls
Remove-Variable * -ea 0

Add-Type -AssemblyName System.Net.Http
$handler = [System.Net.Http.HttpClientHandler]::new()
$ignoreCerts = [System.Net.Http.HttpClientHandler]::DangerousAcceptAnyServerCertificateValidator
$handler.ServerCertificateCustomValidationCallback = $ignoreCerts
$client = [System.Net.Http.HttpClient]::new($handler)

$postSoap = {
    param($body, $action)
    $content = [System.Net.Http.StringContent]::new($body)
    $content.Headers.ContentType = 'text/xml'
    $content.Headers.Add('SoapAction', $action)
    $client.PostAsync($url, $content).Result
}

$body = '
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
    <s:Body>
        <u:ForceTerminationResponse xmlns:u="urn:schemas-upnp-org:service:WANIPConnection:2" />
    </s:Body>
</s:Envelope>
'
foreach($version in 1..2) {
    $url = "http://fritz.box:49000/igd2upnp/control/WANIPConn$version"
    $result = &$postSoap $body 'urn:schemas-upnp-org:service:WANIPConnection:2#ForceTermination'
    if ($result.IsSuccessStatusCode) {break}
}

# wait for the new IP:
$body = '
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
    <s:Body>
        <u:GetExternalIPAddress xmlns:u="urn:schemas-upnp-org:service:WANIPConnection:2" />
    </s:Body>
</s:Envelope>
'
foreach ($sec in 1..30) {
    $result = &$postSoap $body 'urn:schemas-upnp-org:service:WANIPConnection:2#GetExternalIPAddress'
    $response = $result.Content.ReadAsStreamAsync().Result
    $stream = [System.IO.StreamReader]::new($response)
    [xml]$data = $stream.ReadToEndAsync().Result

    $ip = $data.Envelope.Body.GetExternalIPAddressResponse.NewExternalIPAddress
    if ($oldIp -eq $null) {$oldIp = $ip; write-host "old-IP: $oldIp"}
    if ($ip -and $ip -ne $oldIp) {break}
    sleep 1
}
write-host "new-IP: $ip"

works fine. Nice :-)

good catch! I added that new logic into the initial code to support both versions.