Diffie Helman 20 in MX.

[Delphino]

We are configuring a VPN with a non Meraki Peer. Te other side works with DH20. MX doesn't support this. A suggestion of another product?

[alemabrahao]

As you noticed, MX does not support DH20, so your options are to change the DH on the other side or replace the MX with another firewall, such as a Palo Alto for example.

Another option I see would be to set up a Linux VM on the side with the MX and configure the VPN tunnel on that Linux machine and route through it.

[PhilipDAth]

A virtual Cisco ASA.  The most common one I used is the ASAv10.  Run it behind or beside your MX.

https://www.cisco.com/c/en/us/products/collateral/security/adaptive-security-virtual-appliance-asav/...

[GIdenJoe]

Either have the other side change their DH parameter to DH14 or have a separate router device do the VPN and just route to it from the MX.