Comments on: Typo correction and URIBLs… like peanut butter and chocolate http://blog.opendns.com/2007/01/26/domain-based-blacklists/ Making the Internet safer and faster Tue, 07 Feb 2012 20:12:30 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Alan http://blog.opendns.com/2007/01/26/domain-based-blacklists/#comment-13623 Alan Sun, 28 Jan 2007 00:26:53 +0000 http://blog.opendns.com/2007/01/26/domain-based-blacklists/#comment-13623 Thanks for the heads-up! It took me a bit to get around to check this out. Great stuff! When I switched to OpenDNS Pegasus Mail started giving me warnings about links I clicked on. It took me another month or two to get annoyed enough to sit down and figure out what the problem was... When I got in touch with the author, we finally figured out that it was OpenDNS' wildcard response instead of NXDOMAIN that caused the false-positive. He immediately wrote a patch to properly interpret the response -- positive SURBL hits will respond as 127.0.0.xx; any other response is negative. The changes you've made to how OpenDNS handles SURBL lists will ensure that other software that doesn't correctly handle a response will not be broken. Thanks for the heads-up! It took me a bit to get around to check this out. Great stuff!

When I switched to OpenDNS Pegasus Mail started giving me warnings about links I clicked on. It took me another month or two to get annoyed enough to sit down and figure out what the problem was…

When I got in touch with the author, we finally figured out that it was OpenDNS’ wildcard response instead of NXDOMAIN that caused the false-positive. He immediately wrote a patch to properly interpret the response — positive SURBL hits will respond as 127.0.0.xx; any other response is negative.

The changes you’ve made to how OpenDNS handles SURBL lists will ensure that other software that doesn’t correctly handle a response will not be broken.

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