I am using a Cisco ASA 5505 Sec Plus Version 8.2 (5). My ISP has provided me with two subnets. The first is a WAN /30 which provides the peering between my ISP and the outside interface attached to the ISP handoff. The second IP subnet is a LAN subnet. A publicly routed /28. I have assigned the single usable IP from the /30 to the outside interface of my ASA to access the internet. I am able to route the /28 as needed through ACL's and NATs. I am installing a hosted VoIP system that needs to assign one of the IPs from my /28 to it's WAN interface. Normally I would just use a layer 2 switch and set this device up parallel to my ASA. Since everything is behind the /30 however, this is not possible. I must place the VoIP device behind my ASA. So I need to route incoming traffic being sent to a specific IP in my /28 block to the VoIP device behind my ASA. Let me know if additional details are needed. Thanks.