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