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Kerberos Authentication Error

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Dear Support,

On KSC 10.5 server following error appearing with regular interval:

The Kerberos client received a KRB_AP_ERR_MODIFIED error from the server 0338-003$. The target name used was cifs/0338-003.SNDB.COM. This indicates that the target server failed to decrypt the ticket provided by the client. This can occur when the target server principal name (SPN) is registered on an account other than the account the target service is using. Ensure that the target SPN is only registered on the account used by the server. This error can also happen if the target service account password is different than what is configured on the Kerberos Key Distribution Center for that target service. Ensure that the service on the server and the KDC are both configured to use the same password. If the server name is not fully qualified, and the target domain (SNDB.COM) is different from the client domain (SNDB.COM), check if there are identically named server accounts in these two domains, or use the fully-qualified name to identify the server.

 

Kindly guide if this error has any impact on Kaspersky endpoint devices, because there are 350+ devices which have status "Device gone out control", these devices are able to ping KSC server and KSC server is pinging all these devices, also these all devices are doing telnet port 13000. Out of these 350+ devices we have troubleshooted around 30 affected devices and all of them has one thing in common that is "Network Agent Services" are not in running state, when we force this service to start then devices gets normal instantly but after a short interval status returns to same with Network Agent Service not running. Kindly guide on this issue. Thanks

 

GSI Link:

https://www.dropbox.com/s/l3dmcjrhy7zsqx0/GSI6_HO-KAV_kav.admin_02_15_2019_16_11_03.zip?dl=0

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15 hours ago, Konstantin Antonov said:

Hi,

We cannot find following events in the provided logs, could you please provide screenshot of this event.

Thank you!

Dear Support,

Thanks for your prompt response.

I given GSI report, you can see this in System Events (event viewer) logs, there are list of this same error (snapshot attached herewith).

in another snap this issue is from November, 2018. we did each and everything, even we built KSC Server and SQL server from scratch but same issue occurring (Device out of control), so what i doubt is that this error could be the reason which failing authentication somewhere and all affected devices' Network Agent services are in stopped state. Waiting for your expertise suggestion. Thanks

KSC server (event viewer).jpg

Systen Events Kerberos Error.jpg

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Hi,

Could you please clarify what makes you think that this error related to Network Agent wrong behavior?

Could you please provide us with GSI report from one of affected hosts while it is not connected to KSC.

Thank you!

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21 hours ago, Nikolay Arinchev said:

Hi,

Could you please clarify what makes you think that this error related to Network Agent wrong behavior?

Could you please provide us with GSI report from one of affected hosts while it is not connected to KSC.

Thank you!

Dear Support,

We have troubleshooted each and everything but found no anomalies, as mentioned earlier that we also rebuilt SQL Server and KSC server as well but same "Devices gone out of control"' appearing, so i guess that after installing new KSC and SQL its clear that there is no deployment or product issue and this KERBEROS error could be the issue because all of these 350+ Devices gone out of control devices Network Agent services gets stopped after a short time interval, we have taken remote session of around 15 affected devices but all of them having same issues.

We log in with Administrator rights, starts the Network Agent services, but after a short interval the Network agent services gets stopped and this error happens. So now im guessing that this could be because of maybe Kerberos Authentication error which is failing Network agent service to run. What is your expert advice on this. Thank you very much. 

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13 hours ago, Nikolay Arinchev said:

Hi,

Could you please provide us with GSI report from one of affected hosts while it is not connected to KSC?

Thank you!

Ok, i will provide you with that, but meanwhile could you tell me please in the light of your high expertise that does this issue happened before or had any impact previously in any case you have seen ? Thanks

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Waiting for your kind support in this regard. Thanks

 

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5 hours ago, HD said:

Waiting for your kind support in this regard. Thanks

 

Hello.

Please describe the issue from KSC perspective.

The Security-Kerberos errors in the event log are not related to our products. Connectivity issues in KSC, if established to be caused by it, need to be addressed after resolving the root cause.

Thank you.

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This Kerberos Error is showing all those devices that are malfunctioned in KSC, that is why i am trying to figure it out whether this has any impact or its some other issue ? Thanks

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6 minutes ago, Konstantin Antonov said:

Could you please reinstall the server and restore it from the latest backup.

Thank you!

Dear Support,

I have already installed KSC Server and even SQL Server from scratch, and deployed network agent on chunk of affected devices but after a short interval devices are again returning with the same error that is "Device gone out of control". Thanks

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The kerberos client received a KRB_AP_ERR_MODIFIED error from the server <computer name>$. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (<domain name>), and the client realm. Please contact your system administrator.

Error is the result of unsuccessful access to share from remote computer AAA. Administration Server may be the reason -- it may try to access the share during remote push-installation or network scan. Such error often occurs when the Administration Server tries to access a share from computer from another domain.

http://www.eventid.net/display.asp?eventid=4&amp;eventno=1968&amp;source=Kerberos&amp;phase=1

Thank you!

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On 2/19/2019 at 2:25 PM, Konstantin Antonov said:

The kerberos client received a KRB_AP_ERR_MODIFIED error from the server <computer name>$. This indicates that the password used to encrypt the kerberos service ticket is different than that on the target server. Commonly, this is due to identically named machine accounts in the target realm (<domain name>), and the client realm. Please contact your system administrator.

Error is the result of unsuccessful access to share from remote computer AAA. Administration Server may be the reason -- it may try to access the share during remote push-installation or network scan. Such error often occurs when the Administration Server tries to access a share from computer from another domain.

http://www.eventid.net/display.asp?eventid=4&amp;eventno=1968&amp;source=Kerberos&amp;phase=1

Thank you!

Ok. Thank you very much for guiding on this.

Following error appears when trying to start network agent services:

image.thumb.png.736a62b22049463f32cbb4208d10402e.png

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On 2/20/2019 at 9:00 PM, Nikolay Arinchev said:

Hi,

Is it possible to re-install network agent?

Please use that article to remove Network Agent before new installation.

Thank you!

Dear Support,

 

I have re installed the Network Agent on both devices but when the device is restarted same error appears. Kindly find the below snaps for reference. Thanks

 

image.thumb.png.66c9da0c147d3df258449218ce103edb.png

image.thumb.png.e5a65684d971342e444d00ddacc19a53.png

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Dear Support,

Waiting for your kind response. Thanks 

As this issue is now occurring with 500+ devices in the network, despite i have removed KES 11 and Network Agent and re installed these both but still same thing is happening,

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15 minutes ago, Ivan.Ponomarev said:

Hello!

I do not see any Network Agent installation logs. 

Please check if you have any. 

Thanks!

There are no logs in TEMP folder. Thanks

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On 2/28/2019 at 10:01 AM, Ivan.Ponomarev said:

Could you please checkif these logs are created while you install the Network Agent? 

Thanks!

Hi Support,

After reinstallation, both Network Agent and KES application are running in services also, but in KSC server its showing Powered off. When checked this device locally, The Kaspersky Status Send Service service terminated with the following error system call failed,  service control manager, event id 7000. This error is appearing, and after sending heartbeat by klnagcheck -sendhb it is working properly. Why is this happening kindly guide and what is the impact of this event. Thanks

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8 часов назад, HD сказал:

Hi Support,

After reinstallation, both Network Agent and KES application are running in services also, but in KSC server its showing Powered off. When checked this device locally, The Kaspersky Status Send Service service terminated with the following error system call failed,  service control manager, event id 7000This error is appearing, and after sending heartbeat by klnagcheck -sendhb it is working properly. Why is this happening kindly guide and what is the impact of this event. Thanks

Hello!

When this problem reproduces after the  klnagcheck -sendhb utility run?

This may be caused by the problem with accounts that can change with the AD GP.

Thank you!

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4 hours ago, Dmitry Parshutin said:

Hello!

When this problem reproduces after the  klnagcheck -sendhb utility run?

This may be caused by the problem with accounts that can change with the AD GP.

Thank you!

The problem occurs randomly, and this problem is not with just one device but there are numerous device with same error. So i have tried to troubleshoot and i found that KES and Network Agent services are running but KSC is showing the Device out of control. 

This may be caused by the problem with accounts that can change with the AD GP. Could you please elaborate this in more details, if the error is with AD GP then this should be on all devices instead of 300 devices out of 1600.  Thanks

Edited by HD

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