Certain domains trigger high DNSTime and AXTime resulting in proxy timing out for users.

Hey Guy’s

We have been having intermittent issues with our web proxy timing out for our users.  After digging through the logs we determined this happens when a client computer connects to certain domains.  We have identified 4 so far.  When the domain is requested the Dnstime hits 10sec for that log entry and the AXTime for the surrounding logs significantly increase.  The result is an internet outage for 5 to 10 mins.  We have blocked the 4 identified domains in the proxy and this has helped.  We still see the dnstime spike, but the axtime stays at 0.  We have an open ticket with support, but we wanted to see what you all thought about this as we wait. 

I’ll attach some screen shots also.

Cheers