2 ETH ports (WAN/LAN), multiple interfaces

[Vaseer]

Can multiple interfaces be configured on system, that has only 2 ETH ports? One port is for WAN and other for LAN.
I know simple setup can be done on single ETH port (WAN/LAN on same port) using VLANs.

I would like know if it is possible to have 2 ETH ports - first for 2 WAN interfaces and second for 4-5 LAN interfaces.
WAN connections would be:
1.: static IPv4 (PPPoE) + static IPv6 (DHCP)
2.: dynamic IPv4 (PPPoE)

LAN: 4-5 interfaces separated by VLANs with separated DHCP server for each LAN.

Is this possible? If so, what configuration is recommended? What would I have to look out for (any special configuration)?