Hello forum,
I'm trying to do something that seems like it should be easy but so far it has not been. I am trying to create an IPSec VPN connection to a Ubiquiti EdgeRouter X v1.7.1 using a Fortigate 100D. The trick is that the Ubiquiti is behind a Cradlepoint cellular router. The ultimate goal is to reach an industrial device on the otherside of the Ubiquiti.I originally set it up this way for quick and easy access to the Ubiquiti LAN using a PPTP interface which worked great, but now we need to create a persistent tunnel so a server can communicate with it continuously for several days.
I've attached a diagram (redacted the WAN address of the cell modem) in hopes of clearing this up. As you can see this is very simple (the PLC was pre-programmed with an address of 10.0.0.1 so I had no choice but to make the Ubiquiti LAN gateway 10.0.0.100).
This seems like it should not be very hard but I have been unable to get it to work; I did create a IPSec tunnel between my Fortigate and the Cradlepoint, then tried to get to the LAN of the Ubiquiti using static routes on both the Fortigate and Cradlepoint. That didn't work. Then I tried to create a tunnel from the Fortigate directly to the Ubiquiti using the Fortigate's Dial-Up Interface setting...that didn't work either.
What's odd is that I can ping the LAN of the Cradlepoint from the Ubiquti, but I cannot ping either the WAN or the LAN of the Ubiquiti from the Cradlepoint.
Is there anyone who can tell me what I'm missing to configure this properly? I'm running out of time to get it done.