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Comment by chargrilled | Hacker News Reader

I think i've fixed that now!

Fingers crossed.

Not quite. Your rate limiting seems to be cookie based, which makes it easy for someone to circumvent just by replaying their initial request (or by deleting the cookie you set).

Or just hit the vote URL repeatedly with cURL (which is done via GET request).

The author might want to change it to POST/PUT and limit votes based on IP address instead.

It's ok - someone has submitted a sigh to point this out:

http://devsigh.com/sigh/58

Ooops.

There's about a half dozen people down_vote DOSing the server right now.

  sudo iptables -I INPUT -s <offending ip> -j DROP

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