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How to Create a Site-to-Site IPsec VPN Tunnel Using Openswan in Linux

A virtual private network (VPN) tunnel is used to securely interconnect two physically separate networks through a tunnel over the Internet. Tunneling is needed when the separate networks are private LAN subnets with globally non-routable private IP addresses, which cannot be interconnected using traditional routing over the Internet. For example, VPN tunnels are often deployed […]
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