• SURBL Open Letter To Operators Of Redirection Sites updated with best practice recommendations

    October 23, 2011

    SURBL has updated its Open Letter To Operators Of Redirection Sites by adding some best practice recommendations:

    They include:

    • Check links against URI Blacklists,
    • Recheck periodically including, if possible, when redirecting,
    • Deny link creation from malicious IP addresses,
    • Check the resolved IP addresses of the original url,
    • Disallow redirection to other redirectors,
    • Register an abuse contact role account at,
    • Return an http status code of 410 when an abused redirector is removed.

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The main data set is available in different formats:

Rsync and DNS are typically used for mail filtering and RPZ for web filtering. High-volume systems and non-filter uses such as security research should use rsync.

For more information, please contact your SURBL reseller or see the references in Links.

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