multi-WAN with dynamic IPs and port forwarding

Hi,

Could someone share some settings to set up the following?

  • WAN1 is a DSL account connected via ether1 (uses DHCP to get public dynamic IP and gateway of the ISP)
  • WAN2 is a 3G modem that uses PPP (gets public dynamic IP from provider, no gateway due to PPP)
  • Router is configured to 192.168.1.1
  • There is a windows box on the LAN that is masquareded

What I’d like to achieve:

  • Router is pingable via both WANs
  • Winbox login is possible over both WANs
  • Port forward (SSH) to windows box works over both WANs

Thank you for any hints. Actually got to the point of a working ping over both interfaces, but the port forward part did not work no matter what I’ve tried.