Fortigate 90E / Virtual network ?
I need to create a VPN between our agency (using Fortigate 90E) and an external consulting company (using Cisco router). There would be no problem to create the S2S VPN between the two sites, except that our subnet is already known by the consulting company (192.168.1.0/24). So I can't create it for the moment.
Therefore, they asked me to set up a NAT or an equivalent technical solution for the VPN connection in order to be able to make appear our network like 192.168.7.0/24 or other, so that it does not come into conflict with the subnet 192.168.1.0/24 already known at external consulting company.
I joined a diagram to understand the desired topology.
I do not know if it's very complicated or very simple, I may be missing the technical solution but I wanted to know if you had any idea about this implementation on an UTM Fortigate 90E.
Thank you in advance.