CODEWITHSUNDEEP
powershellnetwork-programmingpingnslookupnew-psdrive
YorSubs
YorSubs

Reputation: 4050

PowerShell, discover network information (hostnames + IP) and construct network configuration scripts

I would like my Windows Sandbox to automatically find the ip/name of every host on my home network and so automatically populate my C:\Windows\system32\drivers\etc\hosts and create a helpler script that will connect to the shares on those hosts. This could also be used on any new system that I setup so would generally be very useful. I have identified the parts that can build this, but can't pull together the last parts (how to pick apart the objects in PowerShell).

The excellent Ping-Subnet project here allows me to collect the IPs of the various hosts (although the Windows Sandbox is isolated on the Hyper-V default router), it can still ping everything on my home LAN, so I can assume that the hosts are on 192.168.0.x or 192.168.1.x (if there is a better way to identify the correct subnet, that would be good to know)

Ping-Subnet 192.168.0.x > get the IPs
Ping-Subnet 192.168.1.x > get the IPs

Then, I can use nslookup on each IP to get the hostnames (maybe there is a CmdLet that can replace nslookup though I don't know).

Then, I simply need to structure the resulting information into a string to append to my hosts file that will look like this for my 3 servers (Asus, HPenvy, HP1). This is required as the Windows Sandbox is on a different subnet so can never resolve these names, but will be able to access them by name if these names are entered in hosts:

192.168.1.31 Asus 
192.168.1.71 HPenvy
192.168.1.94 HP1

Finally, I need to construct an equivalent script that connects to all of my shares (my home servers all have the same username/password, and all have a share called Drives under which all other drives are read-only visible).

$cred = Get-Credential
# Create the drive mapping with the input credentials
New-PSDrive -Name M -PSProvider FileSystem -Root \\Asus\Drives -Persist -Credential $cred
New-PSDrive -Name N -PSProvider FileSystem -Root \\HPEnvy\Drives -Persist -Credential $cred
New-PSDrive -Name O -PSProvider FileSystem -Root \\HP1\Drives -Persist -Credential $cred

The above should be easy to construct once I have the IPs and Hostnames. Manipulating the objects with PowerShell pipelines is where I'm stuck. e.g. when I do Ping-Subnet 192.168.1.1 | select Computername I can't get that to work (returns nothing), nor do I see how to slice up the nslookup output. How can I collect the hostnames + IPs and output my required strings above?

Upvotes: 1

Views: 1014

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