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"This page can’t be displayed" when connecting to an HTTPS site

GavinHornigold
This page can’t be displayed

Turn on TLS 1.0, TLS 1.1 and TLS 1.2 in Advanced settings and try connecting to https://ib.absa.co.za again. If this error persists, it is possible that this site uses an unsupported protocol or cipher suite such as RC4 (link for the details), which is not considered secure. Please contact your site administrator.

I am using transparent proxy, but for some reason I just cannot browse this one particular site.

Any assistance will be much appreciated



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Parents

  •  Hi Gavin,

    Execute, "tracert -d ib.absa.co.za" on the system behind UTM. Check where do you face the RTO, is it UTM or ISP? If RTO is captured while going through UTM check #1 in this brilliant guide here.

    Thanks

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

  • in reply to sachingurung

    Hi Sachin,

    Thanks for your reply. I ran the Tracert and it's definitely the UTM blocking access to ib.absa.co.za. Will follow the guide and see what I can find out..

    Excuse my ignorance, but what do you mean by RTO ?

    Regards

    Gavin

  • in reply to GavinHornigold

    Hi Gavin,

    Apologies, abbreviations are confusing sometimes. RTO = request time out. 

    Thanks

    Sachin Gurung
    Team Lead | Sophos Technical Support
    Knowledge Base  |  @SophosSupport  |  Video tutorials
    Remember to like a post.  If a post (on a question thread) solves your question use the 'This helped me' link.

  • in reply to sachingurung

    I followed the guide, but cant find anything wrong with my setup. I even tried to add the following filtering option exception

    ABSA
    Skipping: Authentication / Caching / Block by download size / Antivirus / Extension blocking / MIME type blocking / URL Filter / Content Removal / SSL scanning / Certificate trust check / Certificate date check
    Matching these URLs: ^https?://([A-Za-z0-9.-]*\.)?ib.absa\.co.za\.?/

    Still blocking the site though

  • in reply to GavinHornigold

    Hi, Gavin, and welcome to the UTM Community!

    Have you tried to access the site from the same browser/machine when you're not behind the UTM?  I suspect you have Web Filtering in Transparent mode and are not scanning HTTPS - that the traffic is passing through the UTM with a firewall rule, not Web Filtering.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Reply
  • in reply to GavinHornigold

    Hi, Gavin, and welcome to the UTM Community!

    Have you tried to access the site from the same browser/machine when you're not behind the UTM?  I suspect you have Web Filtering in Transparent mode and are not scanning HTTPS - that the traffic is passing through the UTM with a firewall rule, not Web Filtering.

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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