custom authentication

[Cantor, Scott]

> ​    I am just accessing the remoteuser servlet ​by directly hitting it using the
> http://localhost/idp/Authn/RemoteUser.

And you cannot do that, not in any way. You're trying to misuse the IdP. The IdP supports SAML and CAS, with the service provider / application issuing requests conformant to those protocols through the browser. That's it. Whatever you're trying to do is neither.

-- Scott