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SophosNetFilter causing BSOD

Yoni26

Hello,

We have a client with 26 computers joined to a domain.  Eight of the computers started to have a BSOD as soon as the user would login to their domain profile, or if started to browse the web.  After looking at the dumps we noticed that the cause is SophosNetFilter.

Via Sophos central we turned off the web filter policy, as well as Real-Time Internet scanning.  Once we disabled these settings, the computers stopped crashing and they have been working fine since.  The version of the Sophos Endpoint on the computers is 2023.2.1.6.

The only change on the systems and network was the Windows update KB5034766 that was installed the night prior. 



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[edited by: Gladys at 11:25 AM (GMT -8) on 5 Mar 2024]
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    Hi Yonatan,

    Thanks for reaching out to the Sophos Community Forum. 

    I'd suggest gathering a full memory dump from an affected device, as well as an SDU log. Once you have these, please open a support case via the Sophos Support Portal or by reaching Sophos Support directly using the regional contact numbers on this page. I suspect our team will want to take a much closer look into your issue.

    Could you try running the "fltmc" command on one of the affected devices to verify if any additional drivers are loaded into the operating system? 

    If you have any minidump files already gathered from the previous crashes, could you send one to me via private message? 

    Kushal Lakhan
    Team Lead, Global Community Support
    Connect with Sophos Support, get alerted, and be informed.
    If a post solves your question, please use the "Verify Answer" button.
    The New Home of Sophos Support Videos!  - Visit Sophos Techvids
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  • 0

    Hi Yonatan,

    Thanks for reaching out to the Sophos Community Forum. 

    I'd suggest gathering a full memory dump from an affected device, as well as an SDU log. Once you have these, please open a support case via the Sophos Support Portal or by reaching Sophos Support directly using the regional contact numbers on this page. I suspect our team will want to take a much closer look into your issue.

    Could you try running the "fltmc" command on one of the affected devices to verify if any additional drivers are loaded into the operating system? 

    If you have any minidump files already gathered from the previous crashes, could you send one to me via private message? 

    Kushal Lakhan
    Team Lead, Global Community Support
    Connect with Sophos Support, get alerted, and be informed.
    If a post solves your question, please use the "Verify Answer" button.
    The New Home of Sophos Support Videos!  - Visit Sophos Techvids
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