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From <>
Subject RE: single login form for single sign on
Date Thu, 22 Mar 2001 08:34:26 GMT
> > So in essense the question is: Is there a way to specify a 
> "global" login
> > and error page that will be used by all webapps?
> > 
> No.  Each web application is still a stand-alone entity.
> What single sign on support does for you is remember that 
> you've signed on
> already.  You are still using whatever login mechanism is 
> defined for each
> individual web app.  They don't even have to all use the same approach
> (some could be BASIC, some could be FORM, for example).

What's the thinking behind this? Single sign on would imply having, at least
the option of having a single login page, even if an individual web
application could override the default and provide its own (for instance I
guess webdav can't use FORM, so would have to override a FORM default to use

Having to define login for each we application:
1. provides a maintenance problem if you do want a common login page across
all webapps
2. begins to enter into "using my password for something I haven't approved
it to be used for" teritory. i.e. the login page says you are logging into
webapp1, but in fact your login will be used for webapp2. A single login
page would tell you you are logging into both.

Hence my initial question - is this just the way it has been done, or does
the Spec say it must be done that way etc.?

Many thanks


Tim Dudgeon <>

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