Lansweeper did not find devices

[Braunbert]

Hello all,

My Lansweeper scan did not find computers in our network.
I dont use th eagent I can work only agentless.

I have no idea why I can se some computers and some not.
Example:
in my office I have two computers, both Windows 10, same GPO same domain, same rules for everything.
Computer A has these ip address 172.17.10.34
Computer B has these ip address 172.17.10.35
I can make a ping from the Lansweeper Server to both ip addresss and get a O.K. replay.

If I do a network scan in Lansweeper where I scan after all assets from 172.17.10.30-172.17.10.39 Lansweeper find only computer A but not B. The option "Saved Pinged IP" is active.

Now I have made a device test with the Lansweeper Device Tester Tool and get for Computer these answer:
Lansweeper DeviceTester 7.1.0.1
Scanning Lansweeper Service (on this machine)..
Status: Running
Version: 8.2.120.1
Pinging 172.17.10.35
Ping ok.
TTL: 127
Scanning TCP ports..
Open ports:
135 (EPMAP)
139 (NetBIOS Session Service)
445 (SMB)
Closed ports:
21 (FTP)
22 (SSH)
23 (Telnet)
25 (SMTP)
80 (HTTP)
443 (HTTPS)
9100 (Jetdirect)
16992 (Vpro HTTP)
16993 (Vpro HTTPS)
Scanning DNS..
PC-xxx.xxxxx.xxxxxx.xx
Scanning netbios..
Computername: PC-xxx
Domain: xxxxxx
OS version: 10.0
Platform ID: 500
Scanning netbios (UDP)..
Computername: PC-xxx
Domain: xxxxxx
Scanning netbios (445)..
Could not scan netbios
Scanning SIP..
Error: Socket exception ConnectionReset: Eine vorhandene Verbindung wurde vom Remotehost geschlossen
Scanning SNMP..
ObjectID: 1.3.6.1.4.1.311.1.1.3.1.1
Hostname: PC-xxx.xxxxxx.xxxxxx.xx
Description: Hardware: Intel64 Family 6 Model 142 Stepping 9 AT/AT COMPATIBLE - Software: Windows Version 6.3 (Build 19042 Multiprocessor Free)
Uptime: 0d 0h 1m 3s 430ms
Networkprinter: Microsoft XPS Document Writer v4
MAC 3: 85 B2 03 9F 99 21
MAC 4: 45 32 21 B5 61 87
IpForwarding: 2
Interfaces: 47
Scanning VPRO RMCPPing..
RMCPPing v. 11.8 NotConfigured
Scanning DNS-SD..
No reply to DNS-SD
Scanning UPNP..
No reply to UPNP
Done.

I get a smiliar answer when I make a device test on Computer A

after the scan I can find computer A in my assets, Computer B i still missing...

I have no idea what also I can do to circle the problem.
These problem I hav ewith maybe 200-300 Computers which are mssing in my inventory.
My Licenses is big enough

I have tried this.
https://www.lansweeper.com/knowledgebase/scanning-with-ip-address-range-scanning/
and this
https://www.lansweeper.com/knowledgebase/how-to-scan-a-windows-computer/
and many other things without success 😞

Is there anywhere a log file on the lansweeper server where I can look deaer in th escanning logs what goes wrong or something?
My Lansweeper is on a Windos Server 2019 instaled.

Regards
Scott

Edit: All my domai Users are in our inventry but th emost of them are without any devices .-(

[FrankSc]

Hello,

To test Windows connectivity, you better use testconnection.exe, which resides in the same folder as devicetester.exe.
This tool performs specific Windows tests.