Home DSL Network - Computer Outside FW

My expertise in the PPOE area is lacking.

I have a network (DSL) that is managed (NAT, etc) by a SonicWall TZ170 firewall. As a part of my business, I am often required to run security scans using Nmap, Nessus, etc against client networks. When I had my non-stateful Linksys router in place I could scan at whatever speeds my client networks required. However, the stateful firewall Sonicwall device has a limit of 6,000 connections and it's killing my ability to effectively scan - even at the Nmap "paranoid" rate (which doesn't limit total connections - just simultaneous connections to a single host or target).

My question is:

If I obtain a second static IP from my provider, can I place a hub outside of my firewall (direct to the DSL modem) and have both the firewall and a separate PC connected to that hub - each utilizing one of the static IP's? That way I can run my scans and not be limited by the firewall's connection limitation, but still keep my main network protected. I'm trying to figure out if PPoE can run on 2 separate client machines each pulling in a different IP. My gut tellms me it's not possible.

If so, can an ISP that utilizes PPoE also somehow support a true static IP address? I can't talk to them until tomorrow and am anxious to get other insight first..

Thanks..

PPPoE needs authentication first then it will push down the first IP address of the block you got and make it static on the outside interface the other addresses you recieve can be used however you want by NATing. The work around that I use is to get a netopia router have it do the PPPoE authentication and put it in bridging mode hooked to a hub or switch then put my PIX behind that this way my PIX has a public IP so I can setup VPN tunnels (yes I no PIX can do PPPoE but if I have extra devices I want outside the firewall blah blah). Sorry I responded late I usualy dont reply to "home" networking adds.