Block access in Apache

["Willem-Jan Meijer" <meyer3@chello.nl>]

Hello,

There's a guy who's troubling my girlfriend by adding smut-talk messages to
our guestbook at our site. He's a dynamic IP-adress, so I want to know: is
there a way to block hostnames so he can't access our site?

Kind regards,

Willem-Jan Meijer

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