> Also, Google has published IP addresses it uses, so this extension might not last long... They do not [1], but you can find out by doing a reverse DNS query.

> Also, Google has published IP addresses it uses, so this extension might not last long... They do not [1], but you can find out by doing a reverse DNS query. > "Google doesn't post a public list of IP addresses for webmasters to whitelist" [1] https://support.google.com/webmasters/answer/80553?hl=en https://support.google.com/webmasters/answer/80553?hl=en