Blocking by user agent if ip doesn't match

[António P. P. Almeida]

On 31 Mai 2011 23h44 WEST, nginx-forum at nginx.us wrote:

> Thanks Antonio, so far we've only had fake google bots so it seems
> fine as it is for now. But I'll apply those if there is any issue
> with Yahoo or some other spider being faked.  I am assuming that
> other user agents are not affected by the current rule.

No the default value of $bots is 0. Only in the case of a UA string
containing google (case insensitive) is the IP verified. Otherwise,
since you dropped the line that matched the bad bots UA, all other
bots are allowed.

This is a good approach for handling bots spoofing the UA string and
also a cleaner way to block unwanted bots.

--- appa