I'm a relatively newbie to the UTM but have worked with similar products.
I've enabled the PPTP VPN and can successfully connect, but am unable to connect to any hosts.
Do I need to configure a packet filter or access rule of some sort?
If I check logs, all the client traffic is being routed to the UTM, but then being blocked.
system -> diagnostics -> packet capture
to see if you packets are in fact being sent over the pptp vpn tunnel
interface will be ppp ( something )
then load that into wireshark and see if your client packets are arriving at the UTM device
You should contact support with the capture and the other diagnostics that support will ask for.
With the right diagnostics, support will be able to determine the issue.
Just to check, the subnet you are connecting too, does it conflict with a local subnet to the connecting clients LAN connection ?
I was able to solve the problem. Since first testing the VPN (where it worked fine) I'd subsequently installed VMware Workstation, which added its own virtual NIC used for NAT, with a 192.168.3.1/24 address - same as the remote site is using. I disabled that and - voila, it worked. Thanks for your help, got me thinking in the right mindset.