This Connection is Untrusted in TMG

Dear All,

Via TMG 2010 open any Website its giving message This Connection is Untrusted for more info please find the attachment

Waiting for your solution

Thanks
Kumar
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Ram Kumar ChellamSr. System AdministratorAsked:
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emadallanConnect With a Mentor Commented:
this warning is generated by your mozila browser, please find a workaound here:
http://support.mozilla.org/en-US/kb/This%20connection%20is%20untrusted
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AnuroopsunddConnect With a Mentor Commented:
Most of your internal clients won’t have updated group policy yet, so any https sites they try to visit will throw an error about an untrusted certificate.

Remember, GPUPDATE /FORCE will fix this, but only after GP has replicated throughout the domain, and only for domain members running IE and Chrome.
Remember that if you’re using your TMG as your gateway, you need to configure all your internal hosts to use the TMG’s internal ip.addr as their default gateway.
You are only permitting HTTP, HTTPS, and DNS traffic to pass right now. FTP, IM, and other business-critical traffic is blocked. If you need to permit any other outbound traffic, and you don’t feel like tackling this on your own, don’t start your deployment until you read this upcoming post on configuring access rules.


More details at end of page in below link.

http://retrohack.com/howtoinstalling-microsoft-forefront-tmg-2010-part-two/
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emadallanCommented:
the problem may be the time at your computer is not match with your local time.

to fix this problem,

match you computer time with your local time
to do this go to control panel then choose date and time, change the time.
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infoplateformConnect With a Mentor Commented:
A couple weeks ago I got problem when try login to my facebook account because when hit login button I see page display error
" This connection is Untrusted ". Normally we can login without this problem, and this is very annoying problem if you don't
know how to solve it.
I have 2 Solution for this problem :
first you can try this steps:
1. when you got " This connection is Untrusted " message, click I Understand the Risks
2. and then click add exception button
3. and then you will see new windows and then click get Certificate
4. after few second click Confirm Security Exception and then the page will loading normally and you now can login to
facebook.
this is simple way to solve this problem and not permanent, because when you login again we must repeat from step 1 to step
5.
I tried to find the reason why " This connection is Untrusted " message appear, because at other pc in same network is fine
, I can login normally to facebook. finally I find the reason, the problem is time at your computer is not match with your
local time, I guess this reason why always got this connection is Untrusted message when try login to facebook.
This case not only when you login to facebook, but other website that use https like yahoo, blogspot and others website.
try this second way to fix this problem,
- match you computer time with your local time
to do this go to control panel --->then choose date and time, change the time. Sometimes for few case you cannot resetting
time and date and you got message "you don't have privilege level change system time"
if like this, go to start menu ==> run=== >then type gpedit.msc and then follow this steps:
Local Computer Policy | Computer Configuration | Windows Settings | Security
Settings | Local Policies | User Rights Assignment
then click change system time, for default authorization is for power user and Administrators. If blank click add user/grup
and then click advance tab and then find now, choose user administrator or use that you use now.
and then restart you pc and you now can resetting your computer time.


http://goarticles.com/article/How-to-Solve-this-Connection-is-Untrusted-Problem/2217811/
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Ram Kumar ChellamSr. System AdministratorAuthor Commented:
Thanks
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