带有可疑注释代码的.htaccess文件技术咨询

Hey there! Let’s walk through that commented code in your .htaccess file and unpack what it was supposed to do, plus some key context you should know.

First, here’s your full .htaccess code for reference #

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
php_value max_execution_time 1800
# END WordPress

#RewriteCond %{HTTP_USER_AGENT} Firefox\/40\.1
#RewriteCond %{REQUEST_URI} ^(.*)?wp-login\.php(.*)$ [OR]
#RewriteCond %{REQUEST_URI} ^(.*)?xmlrpc\.php(.*)$ [OR]
#RewriteCond %{R...

What that commented-out code was meant to do #

Let’s break down each line of the commented block:

• #RewriteCond %{HTTP_USER_AGENT} Firefox\/40\.1: This checks if the incoming request is coming from Firefox 40.1—a super old browser version released back in 2015. It’s targeting that specific browser exclusively.
• #RewriteCond %{REQUEST_URI} ^(.*)?wp-login\.php(.*)$ [OR]: This matches any request that tries to access WordPress’s login page (wp-login.php). The [OR] flag means this condition can be paired with the next one (either condition counts as a match).
• #RewriteCond %{REQUEST_URI} ^(.*)?xmlrpc\.php(.*)$ [OR]: This matches requests to xmlrpc.php, a WordPress file used for remote actions (like mobile app logins, API calls, or even brute-force attack targets). Again, the [OR] flag keeps the condition group open.
• Truncated #RewriteCond %{R...: The code cuts off here, but it’s safe to assume there was at least one more condition (like matching a specific IP address, or another URL path) to complete the rule set.

The full intended purpose #

Putting this together, whoever wrote this code was planning to target Firefox 40.1 users trying to access either the WordPress login page or the xmlrpc.php file. Once those conditions were met, a follow-up RewriteRule (which isn’t included here) would have done something like:

• Block the request entirely (return a 403 Forbidden error)
• Redirect the user to another page
• Log the request for monitoring

Why it’s probably commented out #

There are a few likely reasons this code is disabled:

1. Obsolete targeting: Firefox 40.1 is practically unused today—this rule would have almost no real-world impact anymore.
2. Rule issues: Maybe it was tested and accidentally blocked legitimate users, so it got turned off temporarily.
3. No longer needed: The original goal (like blocking a specific attack from that browser version) was resolved, so the rule was retired.

Quick notes if you’re considering enabling it #

• You’ll need to finish the truncated RewriteCond line and add a corresponding RewriteRule to make it do anything useful.
• If you’re worried about xmlrpc.php abuse, there are better ways to secure it (like disabling it via WordPress settings, or blocking all access to it via .htaccess) instead of targeting an ancient browser.

内容的提问来源于stack exchange，提问作者Daniel Romagnoli