IP Scan is skipping devices.

[gjburg]

Hi I've got probably another little bug,

The IP scan skips some IP adresses which have a really fast ping response, and also a have http access.

The strange thing is that i've two identical devices (SAN Switch) and one is scanned and the other is skipped but also my local Cisco WiFi controller is skipped and the one at another site is scanned?

How can I fix this because increasing the ping timeout has no effect,
Or create an option to fill in the IP address, mac address and http site when adding devices manually.

Regards
Gert

[gjburg]

Hi I understand the logic behind the scanning.

But my Cisco wifi controller has a:

ping less then 3ms
http runnning
https running
smnp running

But it won't show up in the lansweeper database.

On http://lansweeper:9524 is it hanging in the list IP_Scans Running
Also after a restart and I triggering the Scan now button
And this ip address is not listed in the errorlog.txt

I also have two SAN switches one of them 10.1.11.244 is detected and added the other is completely identical configured and running the same sofware version isn't listed. This one is in the log with an error.

18-2-2010 10:20:08: 10.1.11.243\1 String or binary data would be truncated.
The statement has been terminated.
at System.Data.Common.DbDataAdapter.UpdatedRowStatusErrors(RowUpdatedEventArgs rowUpdatedEvent, BatchCommandInfo[] batchCommands, Int32 commandCount)
at System.Data.Common.DbDataAdapter.UpdatedRowStatus(RowUpdatedEventArgs rowUpdatedEvent, BatchCommandInfo[] batchCommands, Int32 commandCount)
at System.Data.Common.DbDataAdapter.Update(DataRow[] dataRows, DataTableMapping tableMapping)
at System.Data.Common.DbDataAdapter.UpdateFromDataTable(DataTable dataTable, DataTableMapping tableMapping)
at System.Data.Common.DbDataAdapter.Update(DataTable dataTable)
at LansweeperService.mdlIPscan.UpdateDevice(LS_Device Mydevice, SqlConnection& sqlcon)

[Hemoco]

gjburg wrote:
Hi I understand the logic behind the scanning.

But my Cisco wifi controller has a:

ping less then 3ms
http runnning
https running
smnp running

But it won't show up in the lansweeper database.

Could you try to make a separate ip range with only this item, enable it and do a "scan now"

[gjburg]

Lansweeper wrote:

gjburg wrote:
Hi I understand the logic behind the scanning.

But my Cisco wifi controller has a:

ping less then 3ms
http runnning
https running
smnp running

But it won't show up in the lansweeper database.

Could you try to make a separate ip range with only this item, enable it and do a "scan now"

This has no effect there is even nothing logged in the error log, still hangs in the list of IP scans running. But every day when a new scan starts at midnight a new line added below the ipaddress. So according to lansweeper there are currently 3 scans active to 10.1.1.200

It now more looks like that it's hanging or looping at some port. I did a scan for common ports to the Cisco WiFi controller and this scan told me that the following ports are opened.

TCP, 21,22,80,443 and UDP 161

Please let me know if I need to do something.

[Hemoco]

The logic is:
First ping, if this doesn't response, goto next IP address

Pinging to an address must work before the service tries other protocols (snmp, ssh, http)

[Hemoco]

I would say normally: increase the ping timeout.
Also look in your errorlog.txt file, it will contain ip addresses which can be pinged but have no ports open.

[gjburg]

Lansweeper wrote:
I would say normally: increase the ping timeout.
Also look in your errorlog.txt file, it will contain ip addresses which can be pinged but have no ports open.

Hi, With the fresh install I will also increase the timeout. But one device is only advertising https and probably this is the reason why the device isn't registered in the database. Maybe you should consider to scan for https too?