Google Auth&APM

What error are you getting? When I was playing with this and trying to implement this in a test environment, one of the things I had to do was modify the iRule to offset the time by 16 seconds.

In my instance, I had to change the line

 begin - HMAC-SHA1 calculation of Google Auth token
set time [binary format W* [expr [clock seconds] / 30]]

to

 HMAC-SHA1 calculation of Google Auth token
set time [binary format W* [expr (([clock seconds] - 16) / 30)]