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maschimidt
New Member
June 25, 2020
Solved

IPSec Site-to-Site

  • June 25, 2020
  • 1 reply
  • 2780 views

Hello

I Have one client using vpn site-to-site with my company, now another customer has appeared in which the network segment is the same as that of the first customer, that is, both have the 10.1.0.0/16 network "Phase 2 Selectors - Remote Address" . How would you handle the ipsec tunnel for this other customer?

 

Thanks all

    Best answer by sw2090

    That's not basically a problem of the ipsec tunnel. It is simply overlapping subnets on your FGT. You cannot route the same subnet to two different interfaces.

    One can cope this with mappings if both sides have a fortigate and then use the mapped subnet instead of the original ones. There is a kb article on this when you google for "fortigate overlapping subnet".

     

    1 reply

    sw2090
    SuperUser
    sw2090Answer
    SuperUser
    June 26, 2020

    That's not basically a problem of the ipsec tunnel. It is simply overlapping subnets on your FGT. You cannot route the same subnet to two different interfaces.

    One can cope this with mappings if both sides have a fortigate and then use the mapped subnet instead of the original ones. There is a kb article on this when you google for "fortigate overlapping subnet".