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Sophos and problems downloading large files

zbd

With Sophos Home Ediition 9.2.2 under OS X Yosemite, I'm having some trouble downloading large files through the web browsers, which I think is caused by the SophosWebIntelligence component.  Specifically, I was trying to download a TechNet trial ISO of Windows from care.dlservice.microsoft.com.  In both Chrome and Safari, the download would simply stop half-way through.  The browser would report the download completed (incorrectly, as the file was only around half the expected size), but the SophosWebIntelligence component continued receiving large amounts of data regardless; this also blocked any further browsing I tried to do.  This occurred consistently over several attempts.

I turned off the Web Intelligence options in Sophos, and verified that the WebIntelligence component was inactive:  the browser then downloaded the file at its correct size.

I hadn't noticed this problem with OS X Mavericks, which I had previously been using, but it's possible I just hadn't run into a situation where it occurred.

:1019585


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    Hi,

    I had a chance to try this at work, on a Mac running Mavericks this time, and the same problem occurred.  I note you tried to download a rougly 1GB file:  I've found the threshold is above 4GB.  I tested this with some of the DVD Debian ISO downloads, from http://cdimage.debian.org/debian-cd/7.7.0/i386/iso-dvd/  I believe the 3.7GB file worked when I tried it, but the 4.2GB one did not.

    The problem manifested slightly differently on Mavericks than on Yosemite (though the Sophos versions were a bit different - I think Mavericks was running 9.1.7).  On Mavericks, the browser continued to show the download as being in progress, but never advancing, with SophosWebIntelligence continuing to receive data, but at quite a slow rate.  On Yosemite, the browser actually gave the impression the download had completed successfully, with only the difference in file size to indicate a problem.

    It only seems to be the web browsers themselves that go through SophosWebIntelligence:  I noticed, for example, Mac App Store downloads don't, and I was able to complete a 5GB download from there without problems.

    Thanks very much for trying this out.

    :1019655
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  • 0

    Hi,

    I had a chance to try this at work, on a Mac running Mavericks this time, and the same problem occurred.  I note you tried to download a rougly 1GB file:  I've found the threshold is above 4GB.  I tested this with some of the DVD Debian ISO downloads, from http://cdimage.debian.org/debian-cd/7.7.0/i386/iso-dvd/  I believe the 3.7GB file worked when I tried it, but the 4.2GB one did not.

    The problem manifested slightly differently on Mavericks than on Yosemite (though the Sophos versions were a bit different - I think Mavericks was running 9.1.7).  On Mavericks, the browser continued to show the download as being in progress, but never advancing, with SophosWebIntelligence continuing to receive data, but at quite a slow rate.  On Yosemite, the browser actually gave the impression the download had completed successfully, with only the difference in file size to indicate a problem.

    It only seems to be the web browsers themselves that go through SophosWebIntelligence:  I noticed, for example, Mac App Store downloads don't, and I was able to complete a 5GB download from there without problems.

    Thanks very much for trying this out.

    :1019655
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