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> So each message, no matter the size, should be parsed to determine
> authorization, authentication and validity? As opposed to
> stopping/redirecting a request based on the URL/request-credentials
> before a parse happens?
Should be? Even I'd be reluctant to use something other than "may."
If your gateway facility is fast enough to handle the traffic, than you
can get significant performance gains by offloading stuff like you
mention from your application servers. A J2EE server is not usually the
most performant place to do a WS-Security signature validation.
There are security benefits, too. Put the router into your DMZ and you
prevent bad messages from even getting onto your network. Pass all XML
traffic through it and you have a guaranteed policy enforcement point.
But definitely, not everyone needs or wants to do this. It's all about
Rich Salz, Chief Security Architect
DataPower Technology http://www.datapower.com
XS40 XML Security Gateway http://www.datapower.com/products/xs40.html