Your Connection is Not Private When Accessing Gmail

Every few weeks, the users on our network receive a version of the following in Chrome, FireFox, and IE when trying to access All other SSL sites are fine.

The owner of has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate.

When I restart our Windows 2012 server, restart the PCs, and flush the DNS, it goes away for a few weeks.  Any ideas on a permanent fix?


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Cliff GaliherCommented:
This is almost always a misconfigured proxy server.

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stkoontzAuthor Commented:
Thanks, but can you help me more or would you recommend I bring in a consultant?  I know nothing about proxy servers.
Cliff GaliherCommented:
Unfortunately there just isn't much info to help with. It would really depend on the proxy you have set up (very very very unlikely it is a Windows server) and many firewalls and UTMs have proxy capabilities room so it is so vendor specific that it really depends. Even finding a consultant requires some basic info to properly match skills. Hiring a sonicwall expert wouldn't help if you are running Squid or Watchguard.

And if you don't have the basic info, it is time to hire someone to audit and document your network.
stkoontzAuthor Commented:
The server was just installed a few months ago, so I can go back to the company that installed it.
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