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Windows Defender Firewall get's disabled by Intercept X Advanced

Dreamcatcher

Hello,

multiple customers got in touch with us because they are not able to configure the Windows Defender Firewall anymore. Windows shows that Intercept X Advanced is used as firewall instead. The configuration was not changed, the policy in Central is still set to "Monitor only". Our own clients show the same behaviour:

Anyone with the same problem? I can't exactly say when this change happend, but it has to bee recently. Only clients show this behaviour, on servers everything is still fine.



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  • 0

    Hi Dreamcatcher,

    I ran a quick check on a Windows 10 system and it seems to me that the information which is displayed in the Windows Security Center is incorrect.

    The checks I ran are:

    1. netsh advfirewall show currentprofile --> this one shows that the Windows Defender Firewall is active
    2. wf.msc --> here I modified the predefined outbound "Core Networking Diagnostics - ICMP ECHO Request (ICMPv4 Request)" rule so that it would block these. After activating the rule it blocked all ping requests as expected.

    Regards,
    Marcel

  • 0 in reply to Marcel

    Hey,

    yeah, it seems like the firewall is still working, though to me it looks like a bug in Intercept X that the security center says it is disabled. On servers this behaviour is not present, meaning the security center shows the defender firewall is active as it should be. Sophos support claims that this behaviour is by design, seems pretty inconsistent to me.

  • 0 in reply to Dreamcatcher

    We have to be careful when comparing servers to clients, especially when it comes to the behavior of the Security Center. This is also why we have to deactivate or uninstall Window Defender on servers as described in the following KBA article: https://support.sophos.com/support/s/article/KB-000033429. On a client this is done automatically. 

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