Our comms provider has installed a new leased line in our premises. Part of the contract is a Meraki MX68W appliance and a managed service, which means that any port forwarding requests are given to the provider, and they make the necessary changes.
We are using an elderly SBS 2011 server, which uses PPTP VPN. We are planning to get this replaced in the next few months as it's out of support, but I need to get the VPN working in the meantime.
I put in the request to the provider to open up port 1723 and enable PPTP passthrough through GRE and IP port 43.
I got an email back advising that the MX68W doesn't support GRE, only NAT-T, which I'm not familiar with (and I doubt SBS 2011 is either)
It seems to suggest that when port 1723 is opened, GRE is also enabled. Does anyone know if this applies to the MX68W? As far as I know they haven't tried opening up port 1723 yet. Should it work ok if they do this?