Forefront TMG seems to block connections from one IP address

Posted on 2011-10-14
Last Modified: 2012-05-12
I have a test environment with the usual 2008 R2 DC & Exchange LAN setup, secured by TMG 2010.
We also have a production environment with Sharepoint, Exchange etc hosting an intranet and Exchange OWA; all of this is also secured by TMG 2010.
Both environments are on seperate internet lines & ISPs and are not connected in any form or shape. There is also NO VPN access from one environment into the other so they are completely seperate.
In the test environment I have full internet access and can access the internet in our production environment, let's call it but I am unable to connect to the OWA subdomain
There is however nothing wrong with external access to OWA as I can access it from various other PCs and smartphones, proofing that the OWA setup works fine externally and internally.

The only thing I can think of is that the TMG firewall in our production environment somehow blocks requests that originate from our test environment.
Question by:mark-199
    LVL 16

    Expert Comment

    Hi Mark
    i think you need to setup HTTP to HTTPS Redirection Options in Forefront TMG
    please have a look in the following link:-

    Assisted Solution

    Akicute555, that's not the issue, I can connect from outside my test domain to OWA and inside the test environment I already tried it with https://...

    Accepted Solution

    It suddenly started to work! I put it down to a line issue in our production environment.

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