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SSL Certificate error on all Google Ad links

MontrealTech

We have 1 computer at a client that gets the following message:  Your connection is not private.  It points to www.googleadservices.com

NET:ERR_CERT_AUTHORITY_INVALID

When I look at the certificate, it says Issued to:  www.googleadservices.com  Issued by:  Sophos SSL CA_ZGHssQbvIy4tMmR Valid:  11/28/2021 to 2/20/2022

I looked through all the certificates and did not find anything with Sophos.

It is possible this Laptop used to have Sophos Endpoint Intercept X.  We are no longer using that.

The Firewall is a Sophos XG firewall, and no other users have this issue.

What can I do to solve this?  It's frustrating for the user.  



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  • 0 in reply to MontrealTech

    If the certificate you identity is not a dummy, lease change it?

    Download the CA from the XG and install iron the affected device?

    Ian

    XG115W - v19.5.1 mr-1 - Home

    If a post solves your question please use the 'Verify Answer' button.

  • +1 in reply to MontrealTech

    Hello to Canada,

    you obviously use the XG-Firewall as a webproxy, so the Sophos is working between the pc and the internet-server and inserts its certificate into the traffic.

    The pc systems need to know about that CA this certificate of the appliance is coming from. Therefore you need either to downlaod an deploy that CA on each system manually OR, if they are domain-joined, use a GPO to deploy that certificate to the clients.

    Mit freundlichem Gruß, best regards from Germany,

    Philipp Rusch

    New Vision GmbH, Germany
    Sophos Silver-Partner

    If a post solves your question please use the 'Verify Answer' button.

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