Hi, the only official supported way to identify a google bot is to run a reverse DNS lookup on the accessing IP address and run a forward DNS lookup on the result to verify that it points to accessing IP address and the resulting domain name is in either googlebot.com or google.com domain.
As far as I understand the lua api documentation, it is not possible in lua to perform DNS requests in runtime mode, so the only solution would be to use an external service to do the actual checking of an accessing IP address and use lua to question the external service and cache the result of the IP to increase performance. So as I am not that experienced in lua programming my question is if this is feasible or if I am missing something? Also, if there are other solutions I am not aware I would be thankful if I got pointers. Thanks in advance Reinhard Vicinus
