Dave,

Sorry for taking so long, was a busy day at work; at any rate. On the new SSG where the traffic will be sourced from (traffic destined to your old MIP) you will want to create a static route pointing via the tunnel interface. As this is a longer prefix, it will be preferred. Routing is performed before any policies are looked up (If my memory serves me well), once the static route is in place, what you will want to do is create a policy from your zone that the PHP and ASP hosts are located on (Call it Trust[172.16.100.0/24]?); you have not provided much details on your network, so I am using fictional hosts and IPs at this point. On the new policy that you create (source 172.16.100.0/24, destination [old MIP - public) click on advanced and you will want to select destination NAT, click on translate to IP (use the host ip that was once attached to the MIP) and click on OK.

Create IPSEC Tunnel:
I would recommend a zone name VPN
Use tunnel interface and bind to the VPN
Create policies from the Trust/DMZ to VPN Zone

New SSG:
add static route for old MIP via the tunnel interface
create new policy and create a destination NAT and use the IP address that was once the host address for the MIP on the SSG550.

Hope this helps. This will work

Good luck
Billy


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