ios4 - vpn client for iphone/ipad -

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i want implement vpn client applcation iphone , ipad. requirement develope application enter vpn details , show network traffic , connection. can please me in this, how implement vpn client on ios.

looks vpn api not exposed in apple ios.

http://blog.michael.kuron-germany.de/2010/09/ios-4-1-undocumented-vpn-api-used-by-cisco-anyconnect/


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