IOS – Forcing VPN on demand to “on”

You can configure the VPN setting on your ipad, iphone or ipod touch to save the User Name and Password for VPN. I don't know of a way to have it constantly connect the VPN whenever the is a connection. Given the time it takes to establish a VPN handshake, it would be kind of frustrating to wake the device then not be able to connect to any internet/network related Apps for 15+ seconds while it connects to the VPN.

Choose Settings > General > Network > VPN > then choose the VPN Configuration. Fill in in the username a password section and then you can just turn the VPN on when you need it and not have to fill out the User Name and Password.

more info: http://support.apple.com/kb/ht1424

Alternative you could look at something like Apple's Mobile Access server, to give you that secured VPN like connection all the time without the hassle of starting a VPN connection:

http://www.apple.com/server/macosx/features/mobile-access.html

Bingo! you've already got it there in your question.

Your last item "Web clips Credentials and keys" should actually be two - "Web Clips" and "Credentials and Keys" in which case, "Web Clips" is the one you're looking for. A "Web Clip" is a home screen bookmark for a website.

From the Enterprise Deployment Guidelines:

Web Clip Settings

Use this payload to add web clips to the Home screen of the user’s device. Web clips provide fast access to favorite web pages. Make sure the URL you enter includes the prefix http:// or https://—this is required for the web clip to function correctly. For example, to add the online version of the iPhone User Guide to the Home screen, specify the web clip URL: http://help.apple.com/iphone/ To add a custom icon, select a graphic file in gif, jpeg, or png format, 59 x 60 pixels in size. The image is automatically scaled and cropped to fit, and converted to png format if necessary.