TMG 2010 not allowing DNS  SMTP

Posted on 2011-10-11
Last Modified: 2012-05-12
I have just setup TMG and configured all the clients to use TMG for webacces and can now browse internet.
I have created the access rules from DNS and SMTP and when I am trying to telnet or do a nslookup. I can't see the DNS or ant SMTP request coming to the TMG. I looking and TMG logs and reports section.
Is their some thing that I am missing
Question by:Malli Boppe
    LVL 18

    Accepted Solution

    if you are trying to do SMTP via telnet then you would need to open that port first.
    Does the  TMG log query not show the blocked traffic?

    What is the rule you have setup

    Source - Destination - Port/Protocol?
    LVL 2

    Assisted Solution

    In client computer ,the dns server you set is TMG:
    (1)Install DNS Service in TMG and Configure DNS Query Forward to a public dns server.
    (2)Create a Rule that allow internal -> localhost (DNS & DNS Server)
    (3)Create a Rule that allow localhost - > outsile (DNS & DNS Server)

    In client computer ,the dns server you set is public dns server:
    (1)Create a Rule that allow Internal -> outside.(DNS & DNS Server)

    Also,You can use TMG Monitor Funciton to debug it.Set the Filter Rule to match ClientIPAddress.
    LVL 2

    Assisted Solution

    Review your quesion ,i suggent you do the tests below:
    (1)Create a Rule that allow localhost to External, with all protocol ant all user. Make sure TMG can access Internet.
    (2)Create a Rule that allow inernal to localhost, ping tmg from client, Make sure Client can access TMG.

    If all test success. remove the 2 test rules.And try again witch ID 36954347 which i submit at 10/12/11 04:22 PM.
    LVL 6

    Assisted Solution

    Have you define the dns IPs on TMG Server 2010

    also recheck the rules for allowing DNS and SMTP
    LVL 23

    Author Comment

    by:Malli Boppe
    Thanks guys will come back to you.

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