[Overlapping Subnet] IPsec site-to-site VPN in Fortigate Firewall.

1. How to configure the IPsec site-to-site VPN with overlapping subnets on each end of the VPN
2. Source NAT/Destination NAT configuration to mask the overlapping subnets
3. Overlapping subnets scenario explained with network topology
4. Network topology: techtalksecuri...
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[@yaroslavsavchenko8601]

Thank you.

[@jahangeersk]

Thank you for this excellent training video its pretty good and explains well.
Also I have a question here, how to configure multiple networks from the one firewall to another with a one overlapping network
As my Head Office has multiple subnets and branch has single subnet and the same subnet has overlapping with head office. Please suggest

[@sumitnick4]

Use NAT pool for each overlapping subnet at each side

[@AMROELMAKKI]

good job bro! how can i add new subnet to the tunnel VPN 192.168.1.0/24 after tunnel created

[@sumitnick4]

Add the subnet to phase 2 configuration and have the routes added to tunnel

[@AMROELMAKKI]

@@sumitnick4 thanks bro for info Done!

[@xidaar]

can i do this in Mikrotik?

[@sumitnick4]

I guess yes. But have not tried it

[@xidaar]

​@@sumitnick4 Thank you. Could you please explain how that works?

[@sumitnick4]

@@xidaar I can check if I get the mikrotik OS from mikrotik website