First draft

Check-ChangedIP.ps1

@@ -0,0 +1,43 @@
+# Check Public IP-script
+# 
+#function Check-ChangedIP {
+    param (
+        $Domain,$Alert=$false
+    )
+    
+$apikey = "xx"
+
+# Script starts
+$CurrentIP = Resolve-DnsName $Domain | Select-Object -ExpandProperty Ipaddress
+$credentials = New-Object System.Management.Automation.PSCredential ($apiKey, (ConvertTo-SecureString $apiKey -AsPlainText -Force))
+
+
+$ifconfig = Invoke-WebRequest ifconfig.co/json | ConvertFrom-Json
+
+if ($ifconfig.IP -ne $CurrentIP) { 
+    'new ip!'
+    if ($Alert -eq $true) { 
+      $pushDevices = Invoke-RestMethod -Uri 'https://api.pushbullet.com/api/devices' -Method Get -Credential $credentials
+       foreach ($device in $pushDevices.devices) {
+
+          # build the notification
+           $notification = @{
+               device_iden = $device.iden
+                type = 'note'
+                title = 'IP Address Change detected'
+                body = "New IP address $($ifconfig.ip) is detected"
+           }
+            Invoke-RestMethod -Uri 'https://api.pushbullet.com/api/pushes' -Body $notification -Method Post -Credential $credentials
+        }
+    }
+    else {
+        Write-Host -ForegroundColor Red "New IP detected!"
+        Write-Host -ForegroundColor Red "Old: $CurrentIP"
+        Write-Host -ForegroundColor Red "New: $($ifconfig.ip)"
+    }
+}
+else {
+    Write-Host -ForegroundColor Green "No change!"
+}
+
+#}