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litespeed_wiki:config:recaptcha [2019/06/14 20:04] Lisa Clarke [Override/Disable for Control Panel Virtual Hosts] |
litespeed_wiki:config:recaptcha [2019/07/08 19:34] Lisa Clarke Copyediting |
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| - | When a visitor accesses the website , they will need to go though reCAPTCHA validation to protect against a DDoS attack such as HTTP Flood. | + | When a visitor accesses the website, they will need to go though reCAPTCHA validation. This validation protects the server against HTTP Flood and other DDoS attacks. |
| + | |||
| + | After passing the reCAPTCHA validation, the visitor is temporarily whitelisted as long as they continue to browse the site. This makes for a better user experience. Once the visitor has been inactive for more than 20 minutes, reCAPTCHA is once again enabled for that visitor's next request. | ||
| {{:litespeed_wiki:config:recaptcha3.jpg|}} | {{:litespeed_wiki:config:recaptcha3.jpg|}} | ||
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| (''SOME-CONDITIONAL-CHECK'' would be a suspicious UA, IP address, etc.) | (''SOME-CONDITIONAL-CHECK'' would be a suspicious UA, IP address, etc.) | ||
| + | |||
| + | **NOTE**: In most cases, rewrite rules will override the default server behavior. However, in cases where trigger sensitivity is high, visitors may be sent directly to reCAPTCHA before the rewrite rules can even be processed. | ||
| ===== Customize the Good Bots List ===== | ===== Customize the Good Bots List ===== | ||
| Line 86: | Line 90: | ||
| The default reCAPTCHA page is generic. If you would like to customize the page, you may do so by creating a file at ''$SERVER_ROOT/lsrecaptcha/_recaptcha_custom.shtml''. | The default reCAPTCHA page is generic. If you would like to customize the page, you may do so by creating a file at ''$SERVER_ROOT/lsrecaptcha/_recaptcha_custom.shtml''. | ||
| - | There are two script tags that are required and it is strongly recommended to avoid changing the form and the recaptchadiv unless you know what you are doing. There are three echos within the page itself. Those are used by the web server to customize the reCAPTCHA type and keys and specify any query string used. | + | There are two script tags that are required and it is strongly recommended to avoid changing the form and the ''recaptchadiv'' unless you know what you are doing. There are three echos within the page itself. Those are used by the web server to customize the reCAPTCHA type and keys and specify any query string used. |
| Beyond those required attributes, everything else is customizable. As noted before, please ensure that you have backups of the default page and your customized page. Note that the ''.shtml'' extension is required in order to use the LSWS configured type and keys. | Beyond those required attributes, everything else is customizable. As noted before, please ensure that you have backups of the default page and your customized page. Note that the ''.shtml'' extension is required in order to use the LSWS configured type and keys. | ||
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| Active connections * 100 / **Max Connections** > (100 - **Trigger Sensitivity**) | Active connections * 100 / **Max Connections** > (100 - **Trigger Sensitivity**) | ||
| + | |||
| + | For example: | ||
| + | |||
| + | If **Max Connections** = ''1000'', **Trigger Sensitivity** = ''20'', and you currently have 900 connections, the formula would be evaluated like so: | ||
| + | |||
| + | 900 * 100 / 1000 > 100 - 20 | ||
| + | |||
| + | 90 > 80 | ||
| + | |||
| + | The result is true, so the incoming connection //will// be given a reCAPTCHA test. | ||
| + | |||
| + | Calculating backwards, you can see that when the number of connections drops to less than 800, reCAPTCHA will not be invoked. | ||
| + | |||
| ===== reCAPTCHA Returning 403 and Dropping Connection ===== | ===== reCAPTCHA Returning 403 and Dropping Connection ===== | ||