2024-10-14 14:06:38 +02:00
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# Check Gateway - RMM script
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2024-10-14 14:05:35 +02:00
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2024-10-14 14:06:38 +02:00
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That script is made for RMM using like Solarwinds MSP, NinjaRMM or others.
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## How it works ?
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First, the script gets the gateway's IP address :
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`$LocalIP = (Get-WmiObject Win32_NetworkAdapterConfiguration | Where-Object {$_.IPEnabled}).DefaultIPGateway`
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Then, with the IP address, the script gets the MAC address of the gateway :
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`$MacAddress = ((Get-NetNeighbor -IPAddress $LocalIP).LinkLayerAddress)`
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And the public IP address with opendns.com :
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`$PublicIP = ((Resolve-DnsName -Name myip.opendns.com -Server resolver1.opendns.com).IPAddress)`
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Next, we got arrays containing the MAC addresses by manufacturer :
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```
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$MacFreebox = "F4-CA-E5","00-07-CB","00-24-D4","14-0C-76","34-27-92","68-A3-78","70-FC-8F","8C-97-EA","E4-9E-12"
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$MacLivebox = "00-37-B7"
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$MacApple = "BC-B8-63"
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$MacXiaomi = "E0-CC-F8"
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```
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The script cuts the MAC address of the gateway by 3 groups (bytes) :
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```
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$MacSplit = $MacAddress -split "-"
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$MacPrefix = $MacSplit[0] + "-" + $MacSplit[1] + "-" + $MacSplit[2]
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```
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Next, compares the MAC addresses with arrays :
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```
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if($MacFreebox -contains $MacPrefix)
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{$Router = "a Freebox"}
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elseif($MacLivebox -contains $MacPrefix)
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{$Router = "a Livebox"}
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elseif($MacApple -contains $MacPrefix)
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{$Router = "an Apple device"}
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elseif($MacXiaomi -contains $MacPrefix)
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{$Router = "a Xiaomi device"}
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else # If router is unknown
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{$Router = "Unknown"}
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```
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And give the result of the comparison :
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```
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if ($Router -like 'Unknown') # In the case router is unknown
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{Write-Host "Router is unknown ($MacAddress). Maybe a randomized MAC address" ; exit 1}
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else
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{Write-Host "Gateway is $Router ($MacAddress). `nLocal IP is $LocalIP. `nPublic IP is $PublicIP." ; exit 0}
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```
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