Very clever! unfortunately, the next bot-maker that reads that will probably make a workaround (with the technical description, it's not too hard, but most bots won't see it). Another workaround would be to send 2 spam comments - 1 with each possible comment field used.You could use the day and hour, too. Just let it accept the previous 24 hour's codes (or somewhere in the code embed the current date and check for that)Perhaps a good approach would be to have, say, 10 fields, 9 of which are hidden. Randomly (in the code) place the correct field (in a different position each time). If you get a comment where any hidden fields have different values, count it as spam. If you get multiple of the same (or similar) spam comment from the same IP, block any real comment that comes from it for 1 hour (with a message explaining why the comment is blocked).
lengauMay 10, 2007
Very clever! unfortunately, the next bot-maker that reads that will probably make a workaround (with the technical description, it's not too hard, but most bots won't see it). Another workaround would be to send 2 spam comments - 1 with each possible comment field used.You could use the day and hour, too. Just let it accept the previous 24 hour's codes (or somewhere in the code embed the current date and check for that)Perhaps a good approach would be to have, say, 10 fields, 9 of which are hidden. Randomly (in the code) place the correct field (in a different position each time). If you get a comment where any hidden fields have different values, count it as spam. If you get multiple of the same (or similar) spam comment from the same IP, block any real comment that comes from it for 1 hour (with a message explaining why the comment is blocked).
ploumMay 10, 2007Submitter
lengau > it's exactly what I was thinking. but it would be the next step. Let just wait the spammer answer before ;-)
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