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Web Control - Block downloads of exe's not working

Adrian Henderson

Hello,

I have a policy that seems to be working on a user we are trialing this software out with.  I have some web filters set and they are blocking sites.  But I have set it to not allow exe downloads and other types.  This isn't working.  HP support site printer downloads come down no problem.  It seems simple to configure so am I missing something else or is this not working?



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  • 0

    I assume it is fine for HTTP but not for HTTPS.  The current shipping version only supports HTTP for this part of the solution.

  • 0 in reply to Sophos User930

    It should work fine for HTTPS. However what I recently found out was, that when the QUIC protocol is used (i.e. with Chrome and a Webserver supporting QUIC), it seems to bypass WebControl.

  • 0 in reply to Florian SM

    The current version relies on obtaining the SNI from the handshake to know the domain when the site is served over HTTPS.  It can use this to classify sites so blocking malicious sites and classifying sites works.  The problem here is with the blocking of file types via HTTPS which isn't something the proxy can "see" as the traffic is not decrypted at the endpoint.  It can scan the file as it's written to disk and can be scanned as part of download reputation for the browsers that support that feature

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  • 0 in reply to Florian SM

    The current version relies on obtaining the SNI from the handshake to know the domain when the site is served over HTTPS.  It can use this to classify sites so blocking malicious sites and classifying sites works.  The problem here is with the blocking of file types via HTTPS which isn't something the proxy can "see" as the traffic is not decrypted at the endpoint.  It can scan the file as it's written to disk and can be scanned as part of download reputation for the browsers that support that feature

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