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This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.

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I have set up a PPTP VPN on a Draytek 2820 router for clients to connect to.<br />
I can connect sucessfully from a Windows (7) computer but not from an iPhone.<br />
This is just a standard PPTP VPN connection, but the iPhone just won't connect.<br />
<br />
I have sucessfully managed to do router VPN passthrough and terminate the VPN on a Windows XP computer and both client computer and iPhone connect, but that is no good as the router is performing NAT and can only handle one VPN passthrough client, so I need to go back to the Draytek router for VPN termination, as it can handle mutiple VPN clients connecting at once, which is what I need.<br />
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Can't see why the iPhone won't connect??
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I have set up a PPTP VPN on a Draytek 2820 router for clients to connect to.
I can connect sucessfully from a Windows (7) computer but not from an iPhone.
This is just a standard PPTP VPN connection, but the iPhone just won't connect.

I have sucessfully managed to do router VPN passthrough and terminate the VPN on a Windows XP computer and both client computer and iPhone connect, but that is no good as the router is performing NAT and can only handle one VPN passthrough client, so I need to go back to the Draytek router for VPN termination, as it can handle mutiple VPN clients connecting at once, which is what I need.

Can't see why the iPhone won't connect??

VPN from iPhone to Draytek 2820 router

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

iPhone

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.