Redirect or rewrite?

Here's a slightly cleaned up version. The logic looks correct. I'm not sure why requests would be falling through assuming you have the path and IP correct in the request. Have you tried adding some logging statements to see what values are coming through in your request packets?

 
 when HTTP_REQUEST { 
   if { [string tolower [HTTP::path]] eq "/foo/"} { 
     switch [IP::addr [IP::remote_addr]] { 
       10.12.126.248/255.255.255.255 - 
       10.12.126.249/255.255.255.255 - 
       10.12.126.250/255.255.255.255 - 
       10.24.69.2/255.255.255.255 -  
       default { 
         pool FOO.com-80 
       } 
     } 
   } elseif {[IP::addr [IP::remote_addr] equals 10.0.0.0/255.0.0.0] } { 
     HTTP::redirect "http://www.NEW.com"} 
   }  
 } 
 

Colin