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Web Service No Access

Lioness
Hi,

I have the particolar network configuration that you see in attachment. I configured the SNAT
- External DMZ (Address) -> ANY : SNAT from Internal DMZ (Address)
to permit the ASG to connect to internet (see the thread https://community.sophos.com/products/unified-threat-management/astaroorg/f/55/t/44460).

I enabled Web Security in Trasparent Mode with Full Transparent Option.

For Internet Sites all works correctly.

If a client try to connect to "pearl.inogs.it" or "dru.inogs.it" or in general to an "internal" site, the browser show the "Impossible to find web site" page. Logs show the following message:

2010:03:09-15:11:25 astaro-gw-2 httpproxy[5022]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="GET" srcip="158.110.30.37" user="" statuscode="502" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="2184" time="63227 ms" request="0xaf123028" url="pearl.inogs.it/.../NGO"

2010:03:09-15:11:45 astaro-gw-2 httpproxy[5022]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="GET" srcip="158.110.30.37" user="" statuscode="502" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="2180" time="61768 ms" request="0xaf119f60" url="dru.inogs.it/.../NGO"

ASG categorizes correctly the sites but seem it blocks them, even though the "Non-Profit/Advocacy/NGO" category is allowed. Also the ASG doesn't show the usual "Category Blocked" page.

As workaround I put the IP of those sites in "Transparent mode skiplist" under "Advansed" tab of the Web Security configuration.

Where do you think the problem may be?

Regard,
Stefano


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Parents
  • 0
    "Full transparent" should be selected only when the internal users' actual IPs should be sent as the source of web surf requests instead of "External (Address)".  Your diagram hints that you have private IPs internally, but the 158.x.y.37 IP in the lines above is indeed a public IP; what is your situation?  Please show the SNAT you mention in the diagram?

    In the above, 

    size="2184" time="63227 ms"

    indicates a timeout.  You might be able to use an exception for anti-virus, but the skiplist may be your only solution.

    Cheers - Bob
     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
Reply
  • 0
    "Full transparent" should be selected only when the internal users' actual IPs should be sent as the source of web surf requests instead of "External (Address)".  Your diagram hints that you have private IPs internally, but the 158.x.y.37 IP in the lines above is indeed a public IP; what is your situation?  Please show the SNAT you mention in the diagram?

    In the above, 

    size="2184" time="63227 ms"

    indicates a timeout.  You might be able to use an exception for anti-virus, but the skiplist may be your only solution.

    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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