ModSecurity is a free open source web application firewall which can help you to guard against LFI (local file inclusion attacks) and SQL injection vulnerabilities.
1. Login to server as root
2. /script/easyapache >> Prefer this steps for Cpanel/WHM servers
3. Search for mod security option in it and select it.
That should install mod security in your cpanel. Under apache it should show under installed modules if you run test.php with phpinfo() in it. Try adding some mod security rules. Installing mod_security could be sometimes complicated. Dont use apxs for compiling mod_security as it causes number of problems.
How to install?
1. Login to your server through SSH and su to the root user.
2. First your going to start out by grabbing the latest version of mod_security
3. Next we untar the archive and cd into the directory:
tar zxvf mod_security-1.7.4.tar.gz
4. Now you need to determine which version of apache you use:
root@[~]# /usr/local/apache/bin/httpd -V
Server version: Apache/2.2.17 (Unix)
5. Lets Compile the module now:
/usr/local/apache/bin/apxs -cia mod_security.c
6. Ok, now its time to edit the httpd conf file. First we will make a backup just incase something goes wrong:
cp /usr/local/apache/conf/httpd.conf /usr/local/apache/conf/httpd.conf.backup
7. Now that we have backed it all up, we can edit the httpd.conf.
8. Lets look for something in the config, do this by holding control and pressing W and you are going to search for
<IfModule mod_dir.c> (altho any of the IfModules would work fine)
9. Now add this
# Turn the filtering engine On or Off
# Change Server: string
SecServerSignature " "
# Make sure that URL encoding is valid
# This setting should be set to On only if the Web site is
# using the Unicode encoding. Otherwise it may interfere with
# the normal Web site operation.
# Only allow bytes from this range
SecFilterForceByteRange 1 255
# The audit engine works independently and
# can be turned On of Off on the per-server or
# on the per-directory basis. "On" will log everything,
# "DynamicOrRelevant" will log dynamic requests or violations,
# and "RelevantOnly" will only log policy violations
# The name of the audit log file
# Should mod_security inspect POST payloads
# Action to take by default
# Require HTTP_USER_AGENT and HTTP_HOST in all requests
SecFilterSelective "HTTP_USER_AGENT|HTTP_HOST" "^$"
# Prevent path traversal (..) attacks
# Weaker XSS protection but allows common HTML tags
# Very crude filters to prevent SQL injection attacks
# Protecting from XSS attacks through the PHP session cookie
SecFilterSelective ARG_PHPSESSID "!^[0-9a-z]*$"
SecFilterSelective COOKIE_PHPSESSID "!^[0-9a-z]*$"
10. Save the file :wq!
11. Restart Apache
How Disabling Mod-Security for a single account
To disable the mod_security for a particular account, just add the following in the users .htaccess file
1. vi /home/username/public_html/.htaccess
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