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pandacho
pandacho
New Member
February 13, 2018
Question

VPN between same subnet

  • February 13, 2018
  • 2 replies
  • 3398 views

Hi all

 

I am setting up a vpn for the first time between a fortinet and anther device.

 

the subnet at both ends are the same, so I am wondering what I need to do to get around any conflicts which would occur when I join the 2 (or do I need to change one f them to a different subnet?

2 replies

Markus
Markus
New Member
February 13, 2018

Hi Pandacho

 

It's possible to have overlapping subnets, but the configuration is a bit more complicated and personally I don't like this "hack". If you have the ability to change the subnets, in my opinion, I would do it. Otherwise check this http://cookbook.fortinet.com/vpn-overlapping-subnets/ Good luck

Phinestra200
Phinestra200
New Member
February 13, 2018

Hi,

same subnet both side for vpn interconnexion it's never a good idea and may cause issue in phase 2 of your VPN.

According to what you say, you can perfom a source NAT of this subnet one side and use this new NAT pool or NAT address in the encryption domain.

Phi.

 

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