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StephenMcKay

Hi all,

This weekend we are making some policy changes relating to the SSL/TLS decryption of HTTPS websites. We will be adding a toggle for SSL/TLS decryption into the Threat Protection policy for all customers.

SSL Policy

This new setting will determine if Endpoints not in the Early Access Program (EAP) should decrypt HTTPs websites; it will be set to Off by default.

The settings in Global Settings will remain, it serves two purposes;

1. Set exclusions either by website category or by website name
2. Enable / Disable HTTPs decryption for devices enrolled in the EAP, it is enabled by default

SSL Global Settings

For all customers, the Global Settings page is where categories can be excluded from HTTPs decryption along with individual HTTPs exclusions. Customers not enrolled in the New Endpoint Protection Features EAP will not see the option to enable decryption for their devices

SSL Global Settings

For devices in the EAP, this explains the result of policy settings:

HTTPS Decrypt in Threat Protection policy

HTTPS Decrypt in Global Settings

HTTPS Decrypt Status on the Endpoint

ON

ON

ON

ON

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

For devices not enrolled in the EAP, when they have been migrated to the new product architecture (see https://support.sophos.com/support/s/article/KB-000043550 for details), this explains the result of policy settings:

HTTPS Decrypt in Threat Protection policy

HTTPS Decrypt in Global Settings

HTTPS Decrypt Status on the Endpoint

ON

ON

ON

ON

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

These changes will be applied if devices are added to or removed from the EAP. If an account is enrolled to the EAP, the changes will only affect devices once they are enrolled into the program.

Regards,

Stephen

Parents Comment Children
  • in reply to LHerzog

    I wasn't able to reproduce this myself. If you drop me an SDU then I'd be happy to review the logs. If you want to review the logs yourself then you'll want to check SophosNetFilter.log and look for the ClientHello decision for these domains.

  • in reply to LHerzog

    Hello, I think I understand the issue. The HTTPS Decryption Exclusions page shows items that are excluded. The per-category controls are enabled (green) when you want to exclude that category from decryption. So in your screen shot above, you've configured it to NOT decrypt the following categories:

    • Downloads
    • Health & Medicine
    • Job Search & Career Development
    • Web-based Email

    Because you've disabled the control for Finance & Investment that category WILL be decrypted.

    The logic is sensible when you think of it as activating an exclusion rather than considering it as turn decryption off.

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