.htaccess - Block Blank HTTP_X_FORWARDED_FOR traffic -


is possible block traffic when http_x_forwarded_for blank/empty htaccess?

i've tried these two:

rewriteengine on rewritecond %{http:x-forwarded-for} ^.{0}$ rewriterule .* - [f]

and

rewriteengine on rewritecond %{http:x-forwarded-for} ^$ rewriterule .* - [f]


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