VPN Duplicate Crashes Time Capsule

Recently I chaged my VPN from through Viscosity, which uses OpenVPN interface, to PPTP interface in System Preferences. However I started to notice a strange problem a few days ago. I was trying to connect to my VPN via my MacBook Pro, which is physically and wirelessly connected to a Time Capsule via Ethernet and Wifi. I suspect that the iMac next door, is also connected to the VPN also, and for some reason, that duplicate in the VPN service for both computers seems to have crashed the Time Capsule, and must restart first in order to use it again. At the same time, on my MacBook Pro, the VPN is still displayed as connected as the timing device in the Menubar continues timing the connection. However when I tried to manually disconnects the VPN, it changes to displaying "disconnecting" and continue to do so indefinitely (meanwhile I won't be able to connect to the Internet even though I'm connected to the Time Capsule, howecer all my other devices can access the Internet just fine), until I go into System Preferences to delete the VPN inteface, but soemtimes even that doens't work and I have to restart my computer to set everything straight.
A side note this problem is not only exclusive to my MacBook Pro, it's also apparent on my iMac.
Has anyone came across a problem like this? If so are there any solutions out there available?

I'm having the same issue. I've used my VPN on my devices for the past year and a half and it's only recently that my Time Capsule is crashed by it. I'm wondering if a recent update to the firmware has created the issue. It also happens the same way with my iPad.

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