L2TP/IPSec: Blocked traffic

[cmkb]

Hi!

I set up a VPN via L2TP/IPSec and I am able to connect to it. Pinging the servers in the network is also possible but every other traffic is blocked. Also the outgoing traffic is blocked.

A quick look into the firewall log shows this:

And the reason (rule) for this is
@10 (…) block drop out log inet all label "Default deny rule IPv4"

I tried to figure out how to config the firewall rules but I can't get it to work.
Here are some screenshots showing how the VPN is configured and the firewall rule changes I made: http://imgur.com/a/uFpEP

Do you have an idea what I have to change in order to get it working?

Thanks!