Same device doubled in an Asset list

[Terveer]

I keep see the same devices doubled after a network scan.
One was properly scanned and the other showes "Not Scanned" due to Firewalling.
Even after disabling the firewall both are in the Assetlist.
At both AssetID's I see the same NetBIOS name.
Any idea where to start to tackle this problem?

Regards,a newby.

[Esben_D]

Windows rename detection will only work if both assets have been successfully scanned since it uses information retrieved to verify that it is the same asset.

I'd recommend doing a connection test with testconnection.exe, which can be found in Program Files (x86)\Lansweeper\Actions on your Lansweeper server. Perform the test from your Lansweeper server to the client machine, submit the same credential used by Lansweeper to scan the client.

Once you have more specific information about what is going wrong you can go over this article: https://www.lansweeper.com/kb/1/troubleshooting-guide.html

[Terveer]

Thanks Ian, I will check this.

In one case , a certain device (Thin Client 'TC-294CFC-QC' where the Netbios name is six digits of the MAC Adress and the type of CPU) can be found in the database as a member of the WORKGROUP and the use of win7 as the OS.
The second, same named device with an OS as "Not scanned", all in red characters.
Firewall was on there and in the proper scanned device Firewalling was set as 'off'.

The scan seems not to notice these are the same device.

I could simply delete the 'not scanned' asset but I think this is not te way to work this issue true.

[Ian_F]

When a network asset is being scanned, Lansweeper needs to determine whether or not the asset is already present in the Lansweeper database. It does this by comparing the "unique key" or "internal ID" of the asset. If the unique key of the asset being scanned matches the unique key of an asset already present in the database, the existing asset page is updated. If the unique key of the asset being scanned does not match any unique key already present in the database, a new asset page is generated.

For Windows domain computers the unique key has the following format: domain name\NetBIOS computer name\1. There is a setting in the Lansweeper web console called "Detect when a computer has been renamed" that allows you to automatically detect Windows computer name or domain changes to prevent duplicate assets, it can be enabled under Configuration\Server Options.

• More information on how Lansweeper uniquely identifies assets can be found here: https://www.lansweeper.com/kb/149/how-lansweeper-uniquely-identifies-assets.html
  
• Windows rename detection: https://www.lansweeper.com/kb/87/windows-rename-detection.html