Site-to-site IPsec VPN with Overlapping Subnets (Video)

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In this video, you will learn how to construct a site-to-site IPsec VPN connection between two networks with overlapping subnets. Without the proper configuration, connecting two networks with overlapping subnets can lead to IP conflicts and traffic errors. With the proper configuration, the FortiGate will direct traffic to the correct address on the correct network, using Virtual IP addresses and static routes.

The recipe for this video is available here.

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Jonah Davidson

Jonah Davidson

New Media Documentation at Fortinet Technologies
Jonah Davidson works in Ottawa as part of Fortinet's Tech Docs team, and manages the New Media team. A writer and video creator, he aims to bring Fortinet documentation to everyone who needs it, in every medium possible.
Jonah Davidson

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  • FGUser

    In this video created VPN is configure between 172.20.120.0/24 (FG1) and 172.20.121.0/24 (FG2) Networks.
    Not between overlapping subnets.