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web request blocked: connection refused. But ONLY on some stations

Mast_01

Hello,

i'm having quite an issue with a website that gives said error from ALL internal stations... save a couple.

The setup is quite simple: utm 9.509, standard proxy web filter, not running profiles, or groups or auth or anything.

I already added an exception for the site as you can see in the log.

Policy test indicates the site is NOT blocked

When accesing the site i get:

2018:08:08-17:35:46 astaro httpproxy[16900]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="GET" srcip="192.168.0.29" dstip="198.136.59.3" user="" group="" ad_domain="" statuscode="502" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="2522" request="0xd2113600" url="www.repelautomotiva.com.br/favicon.ico" referer="www.repelautomotiva.com.br/" error="Connection refused" authtime="0" dnstime="525" cattime="0" avscantime="0" fullreqtime="331744" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36" exceptions="av,sandbox,auth,content,url,ssl,certcheck,certdate,mime,cache,fileextension,size"
 
BUT when i access it from a specific station:
2018:08:08-17:38:04 astaro httpproxy[16900]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="192.168.0.8" dstip="198.136.59.3" user="" group="" ad_domain="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Web Filter Profile)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="4762" request="0xceb7c600" url="repelautomotiva.com.br/.../rainha-130x100.jpg" referer="" error="" authtime="0" dnstime="873" cattime="303" avscantime="5290" fullreqtime="4763487" device="0" auth="0" ua="Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0" exceptions="" category="105" reputation="neutral" categoryname="Business" sandbox="-" content-type="image/jpeg"
 
 
i've tried from cellphones, several different PCs, NOTHING is working.


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  • 0 in reply to sachingurung

    Saching,

    there's no blocking for that site in the policy, and as i've said, the test workstation worked ok even before the exception.

    The policy test concurs.

    The error is also a problem since it's "connection refused" but not on all stations.

    The exception is set as:

    Skipping:

    Authentication / Caching / Block by download size / Antivirus / Sandstorm / Extension blocking / MIME type blocking / URL Filter / Content Removal / SSL scanning / Certificate trust check / Certificate date check

    ^https?://www\.repelautomotiva\.com\.br

    and you can see it IS working in the log line i pasted

     

    apparently today it has started working correctly, dunno why

  • 0 in reply to Mast_01

    Hola Mast,

    statuscode="502"

    This means the "blocked" indication is incorrect and that it was the web server that interrupted the connection.  When this appears, the first things to try is an Exception for antivirus.  If that doesn't work, you need to skip the Proxy for the FQDN you're trying to reach.  If it just started working again, I would suspect that the web server configuration was changed so that it's not so "sensitive."

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
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