Block all non-human traffic with .htaccess

Is it possible to only allow browsers and no bots?

[bouncybunny]

Just wondering if it is possible to write .htaccess rules that would block everything but IE, Netscape, Firefox, Safari and Opera?

And yes I also want to block Google Yahoo and MSN. ;)

Any tips?

[phranque]

you can certainly block based on user agent but the user agent can be spoofed.

you should read through this extensive WebmasterWorld thread on blocking bots [webmasterworld.com].

[bouncybunny]

Thanks.

Sure, I appreciate that it's not foolproof, but I just wondered if anyone had done this and what method they used? I have used .htaccess to block bots before, but have never used it to only *allow* certain user agents, rather than *disallow*.

Any help appreciated.

I tried the method here [webmasterworld.com...]
but it keeps giving me internal server errors.

[*EDIT] Found a solution, all is well again ;)