• Webfilter HTTPS decryption breaks ChatGPT: HTTP parsing error encountered
    LHerzog
    We're discovering a strange issue with HTTPS decryption and ChatGPT in all browsers we use. ChatGPT is unusable when we're logged in with the ChatGPT-licensed Microsoft Account. Any chat request generates...
  • TLS decryption issue explanation for beginner
    David Kucera
    Hello, I am converting our customers from primitive FWs to Sophos XGS's and testing TLS decryption. Would anyone be so kind to walk me through what is happening in specific case below: Setup: TLS...
  • Sophos XGS v20.0.2 - Heartbeat service dead - Decryption of passphrase is failed
    Jens Frankiewicz
    Hello, we performed a firewall migration from an XG450 model to the XGS4500 model last weekend. The firewalls are in a HA configuration. The migration process worked seamlessly. The primary firewall...
  • Sophos Firewall v21.0 GA - Kyber TLS (Edge/Chrome) connection reset error for transparent TLS decryption
    AIFS IT Support
    We recently upgraded our Sophos XGS 4300 to SFOS v21. Since then, we are finding that a number of our users were receieving connection reset messages in their browser (Edge and Chrome) when attempting...
  • Setting up exceptions for sites
    Valeriy Korobka
    Hello. I am starting to get acquainted with Sophos Firewall sf01v (sfos 21.0.0 ga-build169). I have configured blocking of sites (for testing I have prohibited access to facebook.com). Tell me how to configure...