IIS X-Forward-For ISAPI Filter
Published Sep 23, 2005
Version 1.0Was this article helpful?
 
 
devcentral.f5.com/.../...iis7-source-included.aspx 
 
Although, if you are stuck on ISAPI, I have tested the ISAPI Filter on 64-bit IIS7. Not sure why IIS7.5 wouldn't work. 
 
-Joe