I use FreePBX with IPSec and OpenVPN everyday without any issues, either site-to-site or server-client. The key to using the OpenVPN client that some phones have embedded is to match the cyphers exactly to what they are supposed to be.
in the end it was simpler than expected i implemented pptp between the freepbx cloud and the router … i think that all routers that do vpn support pptp
here are links with documentation and rest available …
Hi Arielgrin, and Im using FreePBX whit PfSense ( IPSec) vpn tunnel between our offices London-Austin-Dubai and we dont had any issue. I advice to IPSec not PPTP because pptp its not secure…
best…