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Dropbox: KB 125491 - UTM: Decrypt and scan causes some applications to fail authentication

Alexander Busch

As described in KB 125491 I created an exception to skip SSL scanning for dropbox. Didn't work. I had to skip authentication too. Then dropbox was working.

Anybody sharing this experience?

Setup is Proxy in standard mode with authentication against AD.

 

Best regards

Alex



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  • 0

    Hi, Alex, and welcome to the UTM Community!

    Thanks for your question.  I have always skipped everything for Dropbox, but, now that you make me think of it, I've re-enabled SSL Scanning and AntiVirus.  There are now too many people that send links to their Dropbox.  A quick test shows that everything still works correctly, so I'll email this recommendation to my client base.

    Cheers - Bob

  • 0 in reply to BAlfson

    Hi Bob,

    thanks. To clarify I use the Dropbox Windows App. It's working for you as you re-enabled SSL Scanning?

    Best

    Alex

  • +1 in reply to Alexander Busch

    Yes, it works fine, Alex.  Here's a line from the Web Filtering log:

    2016:12:04-11:58:25 utm httpproxy[11572]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="CONNECT" srcip="172.20.x.67" dstip="108.160.172.193" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="7756" request="0x953f0a00" url="https://api-d.dropbox.com/" referer="" error="" authtime="0" dnstime="32222" cattime="0" avscantime="0" fullreqtime="30757791" device="0" auth="0" ua="" exceptions="auth,content,url,certcheck,certdate,cache,size" application="dropbox" app-id="127"

    Cheers - Bob

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  • +1 in reply to Alexander Busch

    Yes, it works fine, Alex.  Here's a line from the Web Filtering log:

    2016:12:04-11:58:25 utm httpproxy[11572]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="CONNECT" srcip="172.20.x.67" dstip="108.160.172.193" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="7756" request="0x953f0a00" url="https://api-d.dropbox.com/" referer="" error="" authtime="0" dnstime="32222" cattime="0" avscantime="0" fullreqtime="30757791" device="0" auth="0" ua="" exceptions="auth,content,url,certcheck,certdate,cache,size" application="dropbox" app-id="127"

    Cheers - Bob

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