New ISP, got WAN and LAN network blocks.

Hi,

We are moving to a new ISP, and they have provided us with WAN and LAN network blocks. Normally when we order a new circuit, we get one block with however many available IPs we need.

From what I can tell, the WAN block gets configured in our WAN interface(tested this, verified working), and we pick out a LAN IP from our LAN block to use for our VIPs.

Is this correct? It sounds like the ISP routes the LAN block to our WAN block if i am understanding this correctly.