retain client information

Hi all.

 

 

I am new to F5 and currently i am evaluating it for our new set of servers. Our physical topology is such that, we require to configure source nat (since we cant change the default gateway on servers or do any sort of route manipulation on them). After configuring source nat so that all client IPs are now translated to an IP lets say 10.1.1.25. Now what approach is usually taken to retain the client information also ? i mean the application admin wants to see the actual client IP also. How is it possible ?