How to install ISA Server 2004 hotfixes and updates: http://support.microsoft.com/default.aspx?scid=kb;en-us;885957
Lockdown mode of operation in ISA Server 2004: http://support.microsoft.com/default.aspx?scid=kb;en-us;838711
The features and limitations of a single-homed ISA Server 2004 computer: http://support.microsoft.com/default.aspx?scid=kb;en-us;838364
How to configure ISA Server 2004 after you add a new network adapter or replace a network adapter: http://support.microsoft.com/default.aspx?scid=kb;en-us;840698