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Page can not be displayed if proxy is not active in IE

Hello,

i´m using sophos utm 220 with latest Software.
Webfilter is set to transparent mode and Internet is working on the Clients without entering a Proxy Server in IE. Only one Website is making Trouble... when trying to Access unternehmen.secure.datev.de via IE it Shows "page can not be displayed"... site only opens when enabling Proxy in IE Settings or using direct Internet via nat without web protection.

I dont unterstand whats the Problem... any hints?

Regards,
Patrick


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Parents
  • Post the relevant log lines from the Web Filter log.

    ----------
    Sophos user, admin and reseller.
    Private Setup:

    • XG: HPE DL20 Gen9 (Core i3-7300, 8GB RAM, 120GB SSD) | XG 18.0 (Home License) with: Web Protection, Site-to-Site-VPN (IPSec, RED-Tunnel), Remote Access (SSL, HTML5)
    • UTM: 2 vCPUs, 2GB RAM, 50GB vHDD, 2 vNICs on vServer (KVM) | UTM 9.7 (Home License) with: Email Protection, Webserver Protection, RED-Tunnel (server)
Reply
  • Post the relevant log lines from the Web Filter log.

    ----------
    Sophos user, admin and reseller.
    Private Setup:

    • XG: HPE DL20 Gen9 (Core i3-7300, 8GB RAM, 120GB SSD) | XG 18.0 (Home License) with: Web Protection, Site-to-Site-VPN (IPSec, RED-Tunnel), Remote Access (SSL, HTML5)
    • UTM: 2 vCPUs, 2GB RAM, 50GB vHDD, 2 vNICs on vServer (KVM) | UTM 9.7 (Home License) with: Email Protection, Webserver Protection, RED-Tunnel (server)
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