Hi,
we have running a PPtP VPN without problems since a few years now. It's still running on RouterOS 4.10.
I have one HQ and 3 offsite networks.
It's working fine since now but now a company try ti install a VoIP telephone system. From two offsite locations it's working fine. I can ping the telephony system in the HQ but it's not working from the third site. I checked all the configurations and there are all the same (only the IP adresses are different). I can ping the system from the router without any issues but not from my PCs in the third location. A Traceroute from the router is fine but not from the PCs. The Trace goes out of my location and to the HQ and then it stops. When i trace something else in the HQ it's fine. It's just this telephone systen that doesn't answer the ping. From my other locations it's all fine.
How can that happen?