Hello, Am Mittwoch, 26. Juni 2013 schrieb Per Jessen:
Christian Boltz wrote:
This also means that one of my spam defenses is having a field that is hidden by CSS - if it is filled, it's a sure sign for a spammer... Nice one, good idea, but why not use a CAPTCHA?
Because they annoy real users.
I know they are occasionally also circumvented, but it requires a real person, which is a lot more effort.
General Version Freeze is with Beta1, I can't help it, but when will the Version Freeze of the
I wouldn't be surprised if spammers use OCR, at least for the captchas that are not terribly readable (which is again also a question of annoying real users - I've seen captchas that are nearly impossible to read by humans) Besides that, blocking spam(mers) is possible even without using captchas. That's not a theory - it's real. I'm running some sites with a guestbook page, and the "write into guestbook" form is of course the main attraction for spammers. On one site, I get some thousand spam attemps per month. If things go really bad, I have to manually delete one (!) entry per month ;-) Let me finish the mail with some details: - the guestbook spamfilter is implemented in 15 lines of PHP (yes, blocking webform spam is much easier than blocking spam mails) - one of my filter conditions is a check if two fields contain the same (non-empty) content - spammers typically enter links in textareas, so checking for "<a href" and "[link=" is a good idea - it's also a good idea to limit how often "http://" may be in a textarea - and, best of all - if someone entered "abc123" in a textarea, it's a sure sign for a spammer ;-) Regards, Christian Boltz -- package manager then happen? With 10.2 RC1? ;-) [Andreas Jäger and Frank-Michael Fischer in opensuse] -- To unsubscribe, e-mail: opensuse-project+unsubscribe@opensuse.org To contact the owner, email: opensuse-project+owner@opensuse.org