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not a clue - but as its automated, who cares? Doesn't cost them anything more.
I have it a lot on sites, especially weblogs that we do. It helps to have non-standard input names. On 8/17/06, Damien Gallagher <[EMAIL PROTECTED]> wrote:
>- see footer for list info -< Out of interest, what are they getting out of submitting, say, a feedback form loads of times? Rich Wild wrote: >> - see footer for list info -< > > oh, I see, that's what a captcha is.. > > God I'm so old, I can't keep up with these new fangled wizbits. > > Anyway, if like me, you're not a fan of plugging other people's things > into > your site without knowing what they do, that's basically the theory. > > On 8/16/06, Rich Wild <[EMAIL PROTECTED]> wrote: > >> >> "The only difficulty would this is get-aroundable by bots, assuming any >> bot writer cares enough about your site to spend the time rewriting >> their >> bot to regex your form field to get the magic word." >> >> Aha - so don't use words, use images. >> >> I've done this before, and its a little fiddly, but practically 100% >> spam >> safe. >> >> On the page hit, read a directory full of images that have magic words >> written on them, the file called the same as the magic word. >> >> Get a random one of those filenames: >> <cfset session.secureImageName = qryImageNames.name[randrange(1, >> qryImageNames.recordcount)]> >> >> set that to a session and display the image in the form - however, don't >> display it using simple <img src="images/secureImages/HYU78.jpg"> >> >> instead, use a CF page that serves up an image with the appropriate >> mimetype using cfcontent >> >> <img src="serveSecureImage.cfm"> >> >> In serveSecureImage.cfm, you read the session variable ( >> session.secureImageName ) you set before and return that using >> cfcontent. >> This means that bots can't simply read the html on the page and find the >> filename and use that in the input as the magic word. >> >> Alternatively, use an image making tag to write a randomly pulled magic >> word from a database or equivalent and simply serve that - this way just >> stops you having to have a directory full of images, but I had fun >> making >> those. >> >> If the magic word posted in the form don't fit the served image - don't >> send the mail! >> >> Richio McStitchio >> Chief Neckchief >> http://www.theideasbarn.com >> >> >> >> On 8/16/06, Duncan Cumming <[EMAIL PROTECTED]> wrote: >> > >> > >- see footer for list info -< >> > I'm not a fan of captchas. Generally inacessible, unless you also >> make >> > an audio version available, and even then not the nicest hoop to >> make users >> > jump through. >> > >> > One method I've seen elsewhere, but haven't used myself, is an >> > additional input box: >> > The magic word is blah. Please enter the magic word. >> > >> > The only place I've seen this method is the mysociety sites, e.g: >> > http://www.mysociety.org/?p=103 >> > >> > The only difficulty would this is get-aroundable by bots, assuming any >> > bot writer cares enough about your site to spend the time rewriting >> their >> > bot to regex your form field to get the magic word. >> > >> > >> > Duncan Cumming >> > New Media Developer >> > Customer Relations Management / Education >> > Fife Council >> > 700 4105 / 01592 414105 >> > >> > >>> [EMAIL PROTECTED] 16/08/2006 14:25 >>> >> > >- see footer for list info -< >> > Hi all. >> > >> > I have a contact form which submits an email (cfmail) >> > The form is being hit by a web bot and sent hundreds of times >> > >> > Is there any way I can stop this? >> > >> > regards - paul >> > >> > >> > _______________________________________________ >> > >> > For details on ALL mailing lists and for joining or leaving lists, >> go to >> > http://list.cfdeveloper.co.uk/mailman/listinfo >> > >> > -- >> > CFDeveloper Sponsors:- >> > >- cfdeveloper Hosting provided by www.cfmxhosting.co.uk -< >> > >- Lists hosted by www.Gradwell.com -< >> > >- CFdeveloper is run by Russ Michaels, feel free to volunteer your >> help >> > -< >> > >> > >> > ********************************************************************** >> > This email and any files transmitted with it are confidential and >> > intended solely for the use of the individual or entity to whom >> they are >> > addressed and should not be disclosed to any other party. >> > If you have received this email in error please notify your system >> > manager and the sender of this message. >> > >> > This email message has been swept for the presence of computer viruses >> > but no guarantee is given that this e-mail message and any >> attachments are >> > free from viruses. >> > >> > Fife Council >> > Tel: 08451 55 00 00 >> > ************************************************ >> > >> > _______________________________________________ >> > >> > For details on ALL mailing lists and for joining or leaving lists, >> go to >> > http://list.cfdeveloper.co.uk/mailman/listinfo >> > >> > -- >> > CFDeveloper Sponsors:- >> > >- cfdeveloper Hosting provided by www.cfmxhosting.co.uk -< >> > >- Lists hosted by www.Gradwell.com -< >> > >- CFdeveloper is run by Russ Michaels, feel free to volunteer your >> help >> > -< >> > >> >> > _______________________________________________ > > For details on ALL mailing lists and for joining or leaving lists, go > to http://list.cfdeveloper.co.uk/mailman/listinfo > > -- > CFDeveloper Sponsors:- > >> - cfdeveloper Hosting provided by www.cfmxhosting.co.uk -< >> - Lists hosted by www.Gradwell.com -< >> - CFdeveloper is run by Russ Michaels, feel free to volunteer your >> help -< > > > _______________________________________________ For details on ALL mailing lists and for joining or leaving lists, go to http://list.cfdeveloper.co.uk/mailman/listinfo -- CFDeveloper Sponsors:- >- cfdeveloper Hosting provided by www.cfmxhosting.co.uk -< >- Lists hosted by www.Gradwell.com -< >- CFdeveloper is run by Russ Michaels, feel free to volunteer your help -<
_______________________________________________ For details on ALL mailing lists and for joining or leaving lists, go to http://list.cfdeveloper.co.uk/mailman/listinfo -- CFDeveloper Sponsors:-
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