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Simple TMG Perfromance Tweaks using DNS

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Boosting TMG Performance through simple DNS tweaks

TMG uses Its own Built-in Name resolution Cache, Then it fails back to DNS, then it fails back to Netbios Name Resolution. Accordingly below are some DNS related methods that can be used to optimize TMG Performance

  1. TMG Perfroms Forward and backward name resolution for Firewall Rules, so pay attention to the effeciency of its access to the DNS server
  2. DISABLE Netbios broadcasts on all network cards. Netbios resolution fails back to a broadcast which takes a very long time, leaving the request pending during that time. The best way to perform this is the following registry value
     Path: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\NetBT
    Parameters
    Name: NodeType
    Type: REG_DWORD
    Value: 2
  3. It is preferable to dedicate a name Server for each TMG Server Array
  4. Put the internal adapter on top of the adapters list, and configure it to use an internal DNS Server
  5.  Do not configure Other adapters with DNS Servers

Comments

  • Anonymous
    January 01, 2003
    Is this registry setting any different than going into the adapter's setting, WINS tab and disabling NetBIOS over TCP/IP?

  • Anonymous
    December 08, 2010
    The comment has been removed

  • Anonymous
    January 31, 2011
    If you have allowed or denied access based on Domain Name sets or URL sets, if TMG gets an IP, it needs to do a reverse lookup to match the set. TMG cannot automagically resolve that IP to a name. have a read at blogs.technet.com/.../isa-server-2006-stops-answering-requests.aspx

  • Anonymous
    January 31, 2011
    BTW my previous comment was for Suliman