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Alexandre MOTTIER 2024-10-14 14:06:38 +02:00
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commit 20b6471082
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28
CheckGateway.ps1 Normal file
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$IP = (Get-WmiObject Win32_NetworkAdapterConfiguration | Where-Object {$_.IPEnabled}).DefaultIPGateway
$MACAddressList = (Get-NetNeighbor -State Reachable)
foreach ($item in $MACAddressList) {
$AdresseIP = $item.IPAddress
$AdresseMAC = $item.LinkLayerAddress
if ($IP -contains $AdresseIP){$GatewayMac = $AdresseMAC ; $GatewayIP = $AdresseIP}
}
$PublicIP = ((Resolve-DnsName -Name myip.opendns.com -Server resolver1.opendns.com).IPAddress)
$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"
$MacLivebox = "00-37-B7"
$MacApple = "BC-B8-63"
$MacXiaomi = "E0-CC-F8"
$MacFortinet = "08-5B-0E"
$MacSplit = $GatewayMac -split "-"
$MacPrefix = $MacSplit[0] + "-" + $MacSplit[1] + "-" + $MacSplit[2]
$Router = (Invoke-WebRequest -Uri "https://api.macvendors.com/$MacPrefix").Content
$ShodanLink = "https://api.shodan.io/shodan/host/" + $PublicIP + "?key=9r6vVczYqYGR9F3WADASttMPt6fqK2Mm"
$Shodan = Invoke-RestMethod -uri $ShodanLink
$ISP = $Shodan.isp
if ($Router -eq ""){"Gateway vendor is unknown ($GatewayMac). `nLocal IP is $AdresseIP. `nPublic IP is $PublicIP."}
else{
Write-Host "Gateway vendor is $Router ($GatewayMac). `nLocal IP is $AdresseIP. `nPublic IP is $PublicIP ($ISP)."}

57
README.md
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# CheckGateway
# Check Gateway - RMM script
That script is made for RMM using like Solarwinds MSP, NinjaRMM or others.
## How it works ?
First, the script gets the gateway's IP address :
`$LocalIP = (Get-WmiObject Win32_NetworkAdapterConfiguration | Where-Object {$_.IPEnabled}).DefaultIPGateway`
Then, with the IP address, the script gets the MAC address of the gateway :
`$MacAddress = ((Get-NetNeighbor -IPAddress $LocalIP).LinkLayerAddress)`
And the public IP address with opendns.com :
`$PublicIP = ((Resolve-DnsName -Name myip.opendns.com -Server resolver1.opendns.com).IPAddress)`
Next, we got arrays containing the MAC addresses by manufacturer :
```
$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"
$MacLivebox = "00-37-B7"
$MacApple = "BC-B8-63"
$MacXiaomi = "E0-CC-F8"
```
The script cuts the MAC address of the gateway by 3 groups (bytes) :
```
$MacSplit = $MacAddress -split "-"
$MacPrefix = $MacSplit[0] + "-" + $MacSplit[1] + "-" + $MacSplit[2]
```
Next, compares the MAC addresses with arrays :
```
if($MacFreebox -contains $MacPrefix)
{$Router = "a Freebox"}
elseif($MacLivebox -contains $MacPrefix)
{$Router = "a Livebox"}
elseif($MacApple -contains $MacPrefix)
{$Router = "an Apple device"}
elseif($MacXiaomi -contains $MacPrefix)
{$Router = "a Xiaomi device"}
else # If router is unknown
{$Router = "Unknown"}
```
And give the result of the comparison :
```
if ($Router -like 'Unknown') # In the case router is unknown
{Write-Host "Router is unknown ($MacAddress). Maybe a randomized MAC address" ; exit 1}
else
{Write-Host "Gateway is $Router ($MacAddress). `nLocal IP is $LocalIP. `nPublic IP is $PublicIP." ; exit 0}
```