https://community.sophos.com/utm-firewall/f/web-protection-web-filtering-application-visibility-control/93170/problem-host-not-foundLately I&#39;ve been having navigation problems with several pages, it shows me &quot;host not found&quot;. Look in the proxy logs and I got the following: 2017: 06: 15-09: 29: 28 utm httpproxy [8429]: severity = &quot;info&quot; sys = &quot;SecureWeb&quot; sub = &quot;http&quot; request = &quot;en-USTelligent Community 12https://community.sophos.com/thread/337279?ContentTypeID=1Sun, 18 Jun 2017 14:57:18 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:eb2cfffa-8496-4780-aab4-79d40180b822BAlfson<p>My guess is that the issue is your ISP, Gerardo, not the UTM.</p> <p>Cheers - Bob</p><div style="clear:both;"></div>