Neil Turner's Blog

Blogging about technology and randomness since 2002

Filtering out proxies to stop comment spam

Phil Ringnalda, who has finally returned to the blogosphere, has posted this list of open proxy servers which are often used by comment spammers. The theory is that by blocking these it may well reduce the tide of spam – a better explanation is offered by Phil.
I’ve actually implemented this at the server level, using mod_rewrite to serve up this error page instead of any content if one of those addresses is used.

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