I have numerous windows systems behind a FWG. Two of them are corporate owned and use a Symantec/Broadcom WSS for web browsing security. Which basically is a proxy that funnels http(s) requests thru Symantec's cloud.
A few times per day, these two windows machines will not be allowed to access websites. Every browser known to man will report "ERR_TUNNEL_CONNECTION_FAILED". When this happens, it's a problem for 1-5 minutes then it clears and we're back in business.
I have 5000 users in North America using the same Symantec product. We're not hearing reports on this issue from our users and for my other windows computers in my home office....when this issue occurs on the work computers, the home computers are just fine.
So I have it in my head that maybe it's a DNS related issue with using the FWG as the primary dns server and this proxy redirect occurring with the client-based solution. Anyone having similar challenges with WSS or Cisco Umbrella, etc...?
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