Managing security on multiple contexts - urgent !

[Lacerda, Wellington (AFIS)]

I've a set of web applications /a, /b and /c and a set of users I want to
have access to them, but using a single login. The user logs in via a form
based login or something and have access to all the applications. Is it
possible in Tomcat 3.2 ?

I wonder if I apply security restrictions to the default web.xml file I can
have all my contexts sharing the same security schema ?

Thanks,

Wellington