Snat Issue

Seems like you made a re-post, but I'll repeat my answer here as well:

There are multiple ways of translating IP's. If all you want is to translate incoming client source IP's on a particular virtual server I'd recommend using a SNAT pool.

To use a SNAT pool on a virtual server:

Go to the virtual server config page. Change Source Address Translation from "None" to automap, or a custom SNAT Pool that you've create yourself. Note that if you create a SNAT pool yourself it should contain at least one IP in the subnet facing the member servers.

/Patrik