g1smd - 7:29 pm on May 20, 2012 (gmt 0)
Yes. I meant to say "MSIE 6.0 and before".
I see a lot of scraper bots, form filling spammer bots and little or no evidence of real human accesses.
If you mean versions 1 to 6 then
(1-6) should be
MSIE/\ should be
MSIE\ too. The slash should not be escaped.
RewriteRule 403.php [F]
RewriteRule !^403\.php - [F]