I have 3 x 2008R2 domain controllers at 2008R2 functional level. The checks in PRTG are alternating between 2200ms and 5ms. I have copied some of the output below. I updated to the latest version to see if it would make a difference.

If I use the powershell script from here it is consistent with about 5ms. https://rcmtech.wordpress.com/2014/10/07/powershell-ldap-response-time-monitor/

How can I get consistent results with PRTG?

11/01/2018 3:14:09 PM 5 msec 0 % 100 % 11/01/2018 3:13:41 PM 2,299 msec 0 % 100 % 11/01/2018 3:13:09 PM 6 msec 0 % 100 % 11/01/2018 3:12:41 PM 2,297 msec 0 % 100 % 11/01/2018 3:12:09 PM 5 msec 0 % 100 % 11/01/2018 3:11:41 PM 2,297 msec 0 % 100 % 11/01/2018 3:11:09 PM 9 msec 0 % 100 % 11/01/2018 3:10:41 PM 2,308 msec 0 % 100 % 11/01/2018 3:10:09 PM 5 msec 0 % 100 % 11/01/2018 3:09:41 PM 2,294 msec

Article Comments

Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

Hello Aimee,

Did you confirm this with the script running on the same host as the responsibe PRTG server/remote probe that runs the sensor? If not, please run the test again on the responsible probe system.

Kind regards,

Erhard


Jan, 2018 - Permalink

So, running the script on the same server as PRTG has the same issue of slow responses. Looks like I have some more investigation to do.

Thanks for the advice.


Jan, 2018 - Permalink

Hi Aimee,

You're welcome. Maybe you can share then what you've found out.

Kind regards,

Erhard


Jan, 2018 - Permalink

LDAP tests work fine on Windows 10, 2012, 2016, 2008. The issue only occurs on 2008R2.

Also, if I use the IP address instead of FQDN or netbios name, it works fine too. DNS response times are good in PRTG, so I don't think its our DNS server.

I think there is a Group policy or security policy causing this.


Jan, 2018 - Permalink

Hi Aimee,

Thank you for sharing your findings you had so far!

Kind regards,

Erhard


Jan, 2018 - Permalink