Hey Guys,
I have a Little Problem. I have a Mikrotik RB2011UiAS-2HnD-IN as Firewall in Use and I have 2 Internet Connections. One SDSL Connection with 16/16Mbit/s and one LTE Connection with 100/50MBit/s. Both have a static IP which is bridged to the Mikrotik.
ETH1: IP OF SDSL
ETH5 IP OF LTE
I have them on 1 and 5 that I can identify them properly 
. Now I want to configure the Mikrotik that way, that all the Servers and the phone System is using the SDSL Connection and all the rest (Clients) are using LTE. Therefor I created a Routing Mark on several IP Adresses for LTE and another Routing Mark for every other IP Adresses on SDSL and had different 0.0.0.0 Routes for the two Routing marks. I had NAT for both Interfaces as well.
Everything was working correctly, but now VPN Connections from Outside. The Mikrotik is a PPTP and L2TP VPN Server for the external Clients. After deploying the Routing marks, the VPN Connection could not have been established. I think the Problem is, that the packets are coming in on WAN1 and going out somewhere, but not WAN2 (maybe they get lost, because they do not know where to go).
Does anyone know a solution for this?
Cheers.
Niklas