I successfully implemented an IDP-initiated SSO with salesforce.com but really struggling with implementing SP-initiated SSO.

Could anyone please explain how to implement or provide a sample?

Any help will be appreciated,

Yoash

After enabling SAML in the Single Sign On Settings, users can now login in two different ways:

1. via the identity provider login page using SSO user name and password. (Which after successful authentication redirects the user browser to salesforce.com including a SAML response)

2. via the https://login.Salesforce.com using the salesforce.com user name and password.

My question: is it possible to allow only option 1 disabling user login via option 2 ?

Thanks in advance,

Yoash 

P.S. I am using a demo a force.com demo account  

After enabling SAML in the Single Sign On Settings, users can now login in two different ways:

1. via the identity provider login page using SSO user name and password. (Which after successful authentication redirects the user browser to salesforce.com including a SAML response)

2. via the https://login.Salesforce.com using the salesforce.com user name and password.

My question: is it possible to allow only option 1 disabling user login via option 2 ?

Thanks in advance,

Yoash 

P.S. I am using a demo a force.com demo account