Ok,
now Im really lost. I did my setup with the help of this tutorial two or three times now and I do not see any differences between the tutorial and my two machines.
Only difference is that my static machine has two interfaces with WAN being the dynamic interface with PPPoE and OPT1 being the static interface like I wrote in my other thread where I was told to update my static box to the latest snapshot because of IPSec on OPT1 not being possible.