iQSonar ScanEngine can be use as IP discovery tool in your Estate and we will look on requirements and setup of the Project to scan an IP space for Devices.
Before we dive into the setup lets focus on what IP Discovery is/does and what it is not/does not do.
By IP Discovery we mean that given IP space (Single IP Address or Subnet or Range of IP's) will be scanned by iQSonar in order to find out, if an IP address does have an Device attached to it, secondly, if so what basic ports is this device listen to on.
As we can see there are two parts to IP Discovery.
1: ICMP Discovery:
ScanEngine will PING an given IP address and awaits an respond, if there is an Device capable to respond to PING ScanEngine will mark the IP in question as success and move to the second part of the IP Discovery.
2: TCP Discovery or PORT Scan.
Once we know that there is actual Device using the IP discovered in step 1, ScanEngine will scan Basic/Common PORT's in order to "guess" what type of the Device is it.
The Basic/Common PORT's we will scan by default are: 22,23,80,443,135,139,445,5985,5986,902, but this can be adjusted if needed to include any unusual Port's used in the Estate.
Based on the outcome of the Port scan we will "guess" what type of the Device it is and append an Suspected OS to it, if applicable or, if the certainty is high enough to guess the OS.
NOTE: As mentioned above we really guess the OS and that is due to fact that ScanEngine will NOT ATTEMPT to log in into the found Device.
How to set up an IP Discovery Project.
Prerequisites:
It's highly recommended to use one ScanEngine per 0.5 million IP's or /13 Subnet, per Location. This will speed up the Discovery process.
We recommend to disable Target logging as well, so the ScanEngine performance on Disk IO will be as minimal as possible. There will be nothing to report in the Targets logs anyway and therefore are not required for any troubleshooting purpose.
Target logging disable:
1: Navigate to: C:\Program Files\iQuate\iQSonar ScanEngine 4.0\bin\ and open the iQSonar config file iQuate.iQSonar.ScanEngine.exe.Config
2: In the Config navigate to part where appender-ref part is as shown bellow and comment out the part for <appender-ref ref="TargetFileAppender"/> shown in green.
NOTE: This is ordinary XML file format and there for XML stile is required.
</appender>
<root>
<level value="FATAL"/>
<!--<appender-ref ref="TargetFileAppender"/>-->
<appender-ref ref="LogFileAppender"/>
<appender-ref ref="ConsoleAppender"/>
<appender-ref ref="TraceAppender"/>
<appender-ref ref="ContextAppender"/>
<appender-ref ref="EventLogAppender"/>
</root>
3: Once done, save file and restart the iQSonar service to pick up the new change we did.
4: Target log creation is disabled now.
Let's now focus on how to create and set up the Location with all necessary Connections and Product Adapters for IP Discovery only.
Locations:
- Lets add an Subnet we would like to scan, create a Sub-Location (One Location per ScanEngine) Details page can be left as is, Scan Window can be setup if needed. Target sets, click on Create
Choose Target as Device
Type as Subnet
Name is mandatory: We will use IPSubnet24 in this example.
Start IP will be Subnet first IP: 192.168.1.0 NOTE: https://kthx.at/subnetmask/ List of Subnets with all details
Subnet Mask Bits: 24
Click on Save & Close
