On May 20, 2021 11:20:27 PM GMT+02:00, the...@sys-concept.com wrote: >On 5/20/21 1:29 PM, tastytea wrote: >> On 2021-05-20 11:20-0600 the...@sys-concept.com wrote: >> >>> It seems to me IPv4 is broken beyond repair. >>> I'm trying to block spammers but they rewrite the source IP (that is not >>> checked) so it is impossible to block them. Example below is from a >>> single source: >>> >>> 189.142.216.209 - - [20/May/2021:09:49:29 -0600] "GET /contact_us.php >>> HTTP/1.0" 200 25552 82.79.97.137 - - [20/May/2021:09:49:31 -0600] >>> "GET /vvc_display.php?vvc= HTTP/1.0" 200 4149 202.138.252.59 - - >>> [20/May/2021:09:49:33 -0600] "POST /contact_us.php?action=send >>> HTTP/1.0" 302 13 91.235.177.140 - - [20/May/2021:09:49:35 -0600] "GET >>> /contact_us.php?action=success HTTP/1.0" 200 24031 41.82.36.214 - - >>> [20/May/2021:09:49:37 -0600] "GET /contact_us.php HTTP/1.0" 200 25725 >> >> As long as the website is find-able by search engines, it doesn't >> matter if it is IPv4 or IPv6. >> A good measure against non-targeted spam is a hidden input field with >> the name “url”. If the bot put anything in that field, throw it out. >> Simple math captchas (like “what is 2 + 3?”) work well too. >> If the spam is targeted, you'll probably need a more advanced captcha >> solution. >> >> See also: >> <https://nearcyan.com/you-probably-dont-need-recaptcha/> >> >> <https://www.nfriedly.com/techblog/2009/11/how-to-build-a-spam-free-contact-forms-without-captchas/> >> >> Kind regards, tastytea >> > >Simple math captchas might work, but I have to find out how to implement it >into current php e-mail form. >
I use Antispam Bee[1] for my contact form on my WordPress website. It works very well without any annoying capcha or anything. You could have a look at how they do it. 1. https://antispambee.pluginkollektiv.org/documentation/ -- Hund
