Description: Due to the scarcity of free IPv4 addresses, providers are mainly offering Dual-Stack Lite connections. This provides an IPv6 address and a private IPv4 address. Providers implement this with the help of carrier-grade NAT. External access is therefore only possible by means of the IPv6 address. Setting up a VPN connection from a pure IPv4 connection is not possible without some additional tools. This requires the use of a translator from IPv4 to IPv6, which is known as a tunnel broker (6in4) and makes use of IPv4 and IPv6 addresses.Please note that this service transmits the data via the servers of the service provider. If the data is not encrypted, the provider is theoretically able to read it! However, this example configuration transmits the data over an encrypted VPN connection. This document describes how to set up a VPN connection from an IPv4 to an IPv6 connection using the tunnel broker Hurricane Electric.Scenario: - The headquarters has an IPv6 Internet connection with Dual-Stack Lite
- A branch office has a pure IPv4 Internet connection.
- A VPN connection is required between the branch office and the headquarters.
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