Certificate errors on all browsers when trying to access secure sites

Posted on 2010-09-08
Medium Priority
Last Modified: 2012-06-27
We have just setup a new TMG forefront server and since I presume some change was made, we are all getting the following message when trying to access legit secure sites such as the bank sites.

"To help protect your security, Internet explorer has blocked this website from displaying the content with security certificate errors. Click here for options."

You can show blocked content but is is TMG that is causing this issue?
Question by:Jamesm007
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LVL 65

Expert Comment

ID: 33632587
I assume this is IE? did u try changing the security settings?

first give this a try

tools->internet options->security tab->internet->custom level_>find display mixed content and set to enable

or if running on trusted sites

tools->internet options->security tab->trusted-> click on sites then add your websites

Accepted Solution

Jamesm007 earned 0 total points
ID: 33632602
I just worked it out, It seems that after turning off allow HTTP inspection ins forefront this has resolved the issue!

I dont recall turning it on
LVL 65

Expert Comment

ID: 33632610
im not too familiar with forefront but is there a security wizard?

I was reading this and it talks about https inspection. is this something you have dealt with? http://www.microsoftnow.com/2010/06/blocking-skype-and-other-im-protocols-in-forefront-tmg.html
LVL 65

Expert Comment

ID: 33632616
oh, beaten me to it :) I was searching the net trying to find solutions to your problem. Well hopefully the link given gives you some insight to https inspection. I think it needs the web access policy configuring to make it more secure.

Author Comment

ID: 33633571
yes thanks, I think someone internally has been playing with my servers and has changed something as it was working yesterday and problem occured this morning :(
Too many techs, no one willing to own up!

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