Redirect URL based on IP

Howdy. This seems to work pretty well, though I have no doubt that if there's a more efficient way to do it, someone will step in and reveal it:

 
when HTTP_REQUEST {
log local0. "URI requested: [HTTP::uri]"

if { [HTTP::uri] equals "/admin/login.php"} {

log local0. "We have a URI match!"
if {[matchclass [IP::client_addr] equals $::good_networks] }{

log local0. "[IP::client_addr] is good! Access to [HTTP::uri] granted"

} else {

log local0. "[IP::client_addr] is not so good! Redirect issued!"
HTTP::redirect "http://www.google.com"

}
}
}

Comment out the log lines and switch the redirect to something more appropriate. Also, this rule makes use of an external data class, which you can create with the F5 iRule editor. In /config/bigip.conf, mine looks like this:

class good_networks {
   {
       network 10.10.10.0/24
       network 192.168.1.0/24
    }
}