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# Inspiration from https://twitter.com/mrhvid/status/929717169130176512 @mrhvid @Lee_Holmes | |
function ResolveIp($IpAddress) { | |
try { | |
(Resolve-DnsName $IpAddress -QuickTimeout -ErrorAction SilentlyContinue).NameHost | |
} catch { | |
$null | |
} | |
} | |
function Get-PingSweep { | |
[CmdletBinding()] | |
Param( | |
[Parameter(Mandatory=$true)] | |
[string]$SubNet, | |
[switch]$ResolveName | |
) | |
$ips = 1..254 | ForEach-Object {"$($SubNet).$_"} | |
$ps = foreach ($ip in $ips) { | |
(New-Object Net.NetworkInformation.Ping).SendPingAsync($ip, 250) | |
#[Net.NetworkInformation.Ping]::New().SendPingAsync($ip, 250) # or if on PowerShell v5 | |
} | |
[Threading.Tasks.Task]::WaitAll($ps) | |
$ps.Result | Where-Object -FilterScript {$_.Status -eq 'Success' -and $_.Address -like "$subnet*"} | | |
Select-Object Address,Status,RoundtripTime -Unique | | |
ForEach-Object { | |
if ($_.Status -eq 'Success') { | |
if (!$ResolveName) { | |
$_ | |
} else { | |
$_ | Select-Object Address, @{Expression={ResolveIp($_.Address)};Label='Name'}, Status, RoundtripTime | |
} | |
} | |
} | |
} | |
<# | |
Get-PingSweep -SubNet '10.56.161' | |
Address Status RoundtripTime | |
------- ------ ------------- | |
10.56.161.1 Success 2 | |
10.56.161.48 Success 0 | |
10.56.161.49 Success 0 | |
10.56.161.51 Success 0 | |
10.56.161.52 Success 0 | |
10.56.161.53 Success 0 | |
10.56.161.54 Success 1 | |
Get-PingSweep -SubNet '10.56.161' -ResolveName | |
Address Name Status RoundtripTime | |
------- ---- ------ ------------- | |
10.56.161.1 b86-bop12-sw18.contoso.com Success 3 | |
10.56.161.48 it-box1-dhwin7.contoso.com Success 1 | |
10.56.161.49 it-box2-dhwin10.contoso.com Success 0 | |
10.56.161.51 it-dept1-uh7yg2.contoso.com Success 0 | |
10.56.161.52 ds101sync.contoso.com Success 0 | |
10.56.161.53 Success 1 | |
10.56.161.54 it-ithd-12tr889.contoso.com Success 1 | |
(Measure-Command -Expression {Get-PingSweep -SubNet '10.56.161' -ResolveName}).Milliseconds | |
441 | |
#> |
@aussiejack586 the code will just scan a /24 (255.255.255.0) subnet - you just enter the first 3 octets of the subnet as in the 2 examples.
So Get-PingSweep -SubNet '10.56.161' will scan IP addresses from 10.56.161.1 to 10.56.161.254.
@joegasper Thanks for the speedy response! I may be doing it wrong however I am getting this message.
Exception calling "WaitAll" with "1" argument(s): "One or more errors occurred."
At line:21 char:5
-
[Threading.Tasks.Task]::WaitAll($ps)
-
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- CategoryInfo : NotSpecified: (:) [], MethodInvocationException
- FullyQualifiedErrorId : AggregateException
I get that error if I try something like:
Get-PingSweep -SubNet 192.168.1.56
The correct command would be:
Get-PingSweep -SubNet 192.168.1
Just give the command the first 3 numbers (octets).
That example will ping from 192.168.1.1 to 192.169.1.254 and list any responding IP addresses in that range.
Hi, the script is owesome thanks, but i have some problems.
Every time when i make a scan, different IP addresses are shown, for example:
Each time I am getting different result (list of active devices) somethink like:
Scan 1:
192.168.20.1
192.168.20.6
192.168.20.164
Scan 2:
192.168.20.1
192.168.20.6
192.168.20.31
192.168.20.164
Scan 3:
192.168.20.1
192.168.20.6
192.168.20.107
192.168.20.99
but i know that one device has 192.168.20.100 Address, and then when i manually make a ping 192.168.20.100
and make pingsweep again, then is Address in the list.
Scan 4:
192.168.20.1
192.168.20.6
192.168.20.107
192.168.20.100
My problem is actually, I need to know which devices are online, it seems that pingsweep is super fast but therfore unreliable.
Do you have any advice?
Thanks in advance!
Super new to this kinda stuff. Where do we input the range of IPs? its not really working for me.