Redirect non logged in users to Login page

Is there a Revo snippet that will check if a user is logged in to a page and if they are not, redirect them to a Login page? I'll explain below.

I have a left hand navigation as follows

Partner Area

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- Login

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- Partner Gold

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- Partner Silver

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- Partner Bronze

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The Login page allows each Partner type (3 different User groups) to login and they can then click on their Partner Type on the left hand navigation to access their area.

I have that much working beautifully (Thanks Bob Ray and his book!).

My issue is that I'm assuming Partners won't just try to click into their Partner page before they login. Currently if they try to do this, they get redirected to a 404 page.

Thanks

Create an "unauthorized" page and set the system setting to that page. When they try to access a page they aren't logged in for, they'll get sent to that "unauthorized" page.

Thanks- that would work but I am likely to eventually have several 'members only' sections and need something more fine tuned.

I think she meant to set 'unauthorized page' system setting to your login page ID.