I'm currently living in a building of Studierendenwerk Bonn and for our internet connection we have to use a PPTP client.
As a big fan of the Ubiquiti EdgeMax series of routers I wanted to use my EdgeRouter PoE for this,
but there is a problem: PPTP on EdgeMax devices is running in Userland, and it is slow, very very slow.
Of my 100Mbit/s connection i was only able to get around 12Mbit/s, this is not good.
Unfortunately Ubiquiti doesn't see improving this as a priority, so I'll have to fix it myself.
Here is a tutorial on how to configure PPTP on EdgeMax devices to run with the pptp kernel module.