[isapros] Re: ISA/IAG Topologies

  • From: Jim Harrison <Jim@xxxxxxxxxxxx>
  • To: "isapros@xxxxxxxxxxxxx" <isapros@xxxxxxxxxxxxx>
  • Date: Mon, 2 Jun 2008 06:47:14 -0700

..pick one.
..no; really - there is no "boilerplate".

It depends on what you have for application and security requirements.
IAG *is* ISA with some kewl stuff tossed into the mix.
Thus, the question of whether to place IAG or ISA at the edge is equivalent to 
asking "should I place ISA or ISA at the edge?"
Deploying ISAG and ISA side-by-side will be determined by the tasking for each 
as well.
In general, using IAG for fwd traffic is; shall we say, a bit less than easy.
Likewise, trying to duplicate the functionality IAG brings to the application 
publishing game is impossible.

IOW, their relative merits in a given scenario depend largely on what you want 
them to do.

Jim

From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On 
Behalf Of Jason Jones
Sent: Monday, June 02, 2008 2:34 AM
To: isapros@xxxxxxxxxxxxx
Subject: [isapros] ISA/IAG Topologies

Hi All,

I was wondering what sort of topologies you guys had used for customers who 
were looking at combined ISA Server and IAG deployments?

For example:

Should ISA be the edge device with IAG in an ISA protected perimeter network?

Should ISA and IAG be placed in parallel?

Should IAG be placed between two ISA Server edge firewalls (e.g. between 
front-end and back-end ISAs)?

Any feedback appreciated...

Cheers

JJ




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