ConfigServer eXploit Scanner (cxs) is a tool from us
that performs active scanning of files as they are
uploaded to the server. Initial
installation with recommended configuration options is
included with the license.
ConfigServer eXploit Scanner
Active scanning can be performed on all text files:
- Actively scans all modified files within user accounts using the cxs Watch daemon regardless of how they were uploaded
- PHP upload scripts (via a ModSecurity hook)
- Perl upload scripts (via a ModSecurity hook)
- CGI upload scripts (via a ModSecurity hook)
- Any other web script type that utilises the HTML form ENCTYPE multipart/form-data (via a ModSecurity hook)
- Pure-ftpd uploads
The active scanning of files can help prevent
exploitation of an account by malware by deleting or moving
suspicious files to quarantine before they become active.
It can also prevent the uploading of PHP
and perl shell scripts, commonly used to launch more
malicious attacks and for sending spam.
cxs also allows you to perform on-demand scanning
of files, directories and user accounts for suspected
exploits, viruses and suspicious resources (files,
directories, symlinks, sockets).
You can run scans of existing user data
to see if exploits have been uploaded in the past or via
methods not covered by the active scanning. It has been
tuned for performance and scalability.
Exploit detection includes:
- Over 4000 known current exploit script fingerprint matches (in addition to standard ClamAV detection)
- Known viruses via ClamAV
- Regular expression pattern matching to help identify known/unknown exploits
- Filename matching
- Suspicious file names
- Suspicious file types
- Binary exeuctables
- Some illegal web software installations
- Custom user specified regular expression patterns
- Comprehensive constant scanning of all user data using the cxs Watch daemon - scans all
user files as soon as they are modified
- Daily check for new Exploit Fingerprints
- Check for old version of popular web scripts (e.g. Wordpress, Joomla, osCommerce)
- Bayes probability scanning - scans scripts and passes the contents through an algorithm which produces a probability as to whether it is an exploit
- Monitor files and directories for changes and send an email report of activity
- New in v7: IP Reputation System. The system provides a variety of IP blocklists gathered from information that is submitted by participating servers. This dual aspect provides the information to help protect the server using the reputation from active attacks
- New in v7: Major update to Script Version Scanning. cxs now scans for more than 200 individual applications, more than 200 WordPress plugins and more than 200 Joomla Extensions. Over 700 in total!
- ... and lots more!
Web-based User Interface:
Included with the cxs Command Line Interface (CLI) is a web-based User Interface (UI) to help:
- Run scans
- Schedule and Edit scans via CRON
- Compose CLI scan commands
- View, Delete and Restore files from Quarantine
- View documentation
- Set and Edit default values for scans
- Edit commonly used cxs files
Note: cxs is not a rootkit scanner, though it can help detect rootkits uploaded to user accounts.
Frequently Asked Questions
Please read the cxs FAQ before ordering cxs.
- Server with static IPv4 address (for licensing)
- Redhat/CentOS/CloudLinux Linux v5/6/7
- Apache v2+
- ClamAV daemon process, for virus scanning
- ModSecurity v2+, to enable upload script scanning (not supported for litespeed, nginx, etc. - only Apache v2+)
- Pure-ftpd, compiled with --with-uploadscript for ftp upload scanning
- csf, if you want pure-ftpd IP address blocking
Note: Support is not guaranteed for servers running services from 1h.com, ASL or Bitninja.
Additional requirements for cxs Watch daemon:
- Kernel with inotify support, e.g. RedHat/CentOS/CloudLinux v5/6/7+ OS vendor kernels - required for cxs Watch daemon
- Linux::Inotify2 perl module - required for cxs Watch daemon
Note: The Virtuozzo VPS does not allow the changing of
kernel parameters and may require /proc/sys/fs/inotify/max_user_watches
to be increased by your provider if more inotify resources are required
than is set, some providers may not be willing to do this.
Also, a small number of VPS providers use a kernel with a broken inotify
implementation which prevents the cxs Watch daemon from functioning and
results in Out of Memory errors for which we have no solution.
cxs is a commercial product that is sold and licensed on a per server basis. Unlike competing products, it is strictly a one-time per server license purchase with updates for the life of the product, all at a reasonable price! Initial default installation on a single server per license is included in the price. Please see the FAQ for more information about discounts and installation.
Bulk purchase discounts are available. Please see the cxs FAQ.
A license for cxs is also included free when you purchase our cPanel Service Package