Re: [gentoo-user] IPv4 broken beyond repair

[Hund]

On May 20, 2021 11:20:27 PM GMT+02:00, thelma@×××××××××××.com wrote:
>On 5/20/21 1:29 PM, tastytea wrote:
>> On 2021-05-20 11:20-0600 thelma@×××××××××××.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