I have a Raspberry with eth0 (192.168.02 / static) connected to a router (Fritz Box @ 192.168.0.1). The Router has internet connection. The Raspberry has a mobile usb stick with ppp connect to the internet. Actually if ppp is not connected the internet access from the Raspberry is through the Router over eth0. If ppp is connected the internet access is via ppp. if i del the default route for eth0 there is no internet connection if ppp is not connected and if ppp is connected internet connection is through ppp. so far everything fine. but if restart the raspberry it again has internet connection through eth0. But i only want to allow the raspberry internet connection only via ppp. eth0 just for internal communication like ssh. any ideas how to configure that?
/etc/network/interfaces looks like:
iface lo inet loopback
iface eth0 inet static
iface wlan0 inet manual
iface wlan1 inet manual