Logout with new shibboleth sp

[Justin Russo]

Hi
Im new to shibboleth and currently using the latest version of shibboleth sp.
I have set everything up and i can login  using my idp.
for the logout part, i have a button on my page which on click event is linked to the url - https://mydomain.com/Shibboleth.sso/Logout.

Now this will redirect me to the default shibboleth logout page. I have a few questions.

1. after the default logout page seen, when i hit back button on my browser i can still see the pages of a logged in user, how can i prevent this.

2. i know that when i click logout (https://mydomain.com/Shibboleth.sso/Logout), i go to the deafult shib logout page, i also have a custom logout page, can i redirect it to my custom logout page but at the backend make sure everything works fine. How can i achieve this.
I believe i have to modify my shibboleth2.xml file. currenlty all i have there is -

<Logout>SAML2 Local</Logout>


could you please provide the syntax on how i can redirect to my custom logout page and make sure the shibboleth logout happens as default in backend.

thanks and appreciate you time.
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