Re: Blocking form spam
This WebDNA talk-list message is from 2006
It keeps the original formatting.
numero = 67910
interpreted = N
texte = Use grep.Stuart Tremainidfk web developments, sydney, australiaOn 09 Aug 2006, at 10:08 AM, Tom Duke wrote:> Hi,>> A couple of my sites are starting to get hit by bots that are sending> spam through contact and sign-up forms. I can't use CAPTCHAS on > some of> these forms and was wondering what techniques others are using to try> and block this stuff.>> Also on some forms the spammers are adding email headers hoping to > push> email through if any of the form fields are passed on to sendmail. I> have read that the way to block this is to strip linefeed and carraige> return characters out of the fields. The best that I have come up > with> is:->> [table name=removelinefeeds&fields=from,to]> %0A> %0D> [/table]>> [text]_cleanname=[convertwords> table=removelinefeeds][_name][/convertwords][/text]>> Does anyone have a neater way to strip these characters ?>>> Thanks> - Tom>> -------------------------------------------------------------> This message is sent to you because you are subscribed to> the mailing list
.> To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to digest@talk.smithmicro.com>> Web Archive of this list is at: http://webdna.smithmicro.com/-------------------------------------------------------------This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
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Use grep.Stuart Tremainidfk web developments, sydney, australiaOn 09 Aug 2006, at 10:08 AM, Tom Duke wrote:> Hi,>> A couple of my sites are starting to get hit by bots that are sending> spam through contact and sign-up forms. I can't use CAPTCHAS on > some of> these forms and was wondering what techniques others are using to try> and block this stuff.>> Also on some forms the spammers are adding email headers hoping to > push> email through if any of the form fields are passed on to sendmail. I> have read that the way to block this is to strip linefeed and carraige> return characters out of the fields. The best that I have come up > with> is:->> [table name=removelinefeeds&fields=from,to]> %0A> %0D> [/table]>> [text]_cleanname=[convertwords> table=removelinefeeds][_name][/convertwords][/text]>> Does anyone have a neater way to strip these characters ?>>> Thanks> - Tom>> -------------------------------------------------------------> This message is sent to you because you are subscribed to> the mailing list .> To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to digest@talk.smithmicro.com>> Web Archive of this list is at: http://webdna.smithmicro.com/-------------------------------------------------------------This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
Stuart Tremain
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