Revision as of 15:49, 8 February 2013

Introduction

Atomic Secured Linux(tm), or "ASL" for short, is a Unified Security Suite addon for Linux(tm) systems designed to protect servers against zero day threats. Unlike other expensive security "solutions" that pretend to achieve security through signature-based detection, known-vulnerability patching and other reactive methods, Atomic Secured Linux(tm) provides real proactive security. The only solution that hardens both your applications and operating system, Atomic Secured Linux is essential for public-facing servers and shared-hosting environments.

And Atomic Secured Linux (ASL) is uniquely designed for beginners and experts alike. You just install ASL onto your existing system and it does all the work for you, plus you can try it for free!

ASL works by proactive immunizing the system against whole classes of vulnerabilities, and combines security at all layers, from the firewall, to your applications and services, and all the way down to the kernel to provide the most complete multi-spectrum protection solution available for Linux servers today. It helps to ensure that your system is secure and also compliant with commercial and government security standards. ASL is uniquely effective at addressing emerging threats posed by vulnerabilities in todays complex systems and applications, such as cloud and web hosting environments, multiuser systems, CRM's, ERPs, forums, shopping carts, Content Management systems, custom applications and more.

How can I get a copy of ASL?

Please visit the Atomic Secured Linux product page.

Can I try it out first?

Absolutely! Just sign up for a no risk and no obligation free 30 day trial here.

Where is the ASL FAQ?

ASL FAQ - Atomic Secured Linux Frequently Asked Questions (FAQ)

Features in ASL

Host Based Intrusion Detection for event monitoring, file system integrity checking, and rootkit detection

Web Based Security Information Manager and Unified Threat Manager

Web Application Firewall with Realtime Gotroot.com rules

Vulnerability scanner and vulnerability repair and elimination system

Realtime Malware Protection

Hardened secure kernel to protect against rootkits, includes commercial support for grsecurity and PaX

Self Healing system for system and application errors

Self Learning Least Privilege Role Based Access Control System

System Hardening tools

Firewall enhancements and manager

Stand Alone secure web GUI

Malware uploader scanner (Web and FTP)

Brute force attack detection (FTP, SSH, Web, SMTP, POP, IMAP and more!)

Just In Time Patching system: Automatic security rules to protect unpatched systems

Rootkit detection and prevention, including kernel level rootkits

Process monitoring watchdog, to ensure critical and security services are always running

Web Application inventory module

Systems configuration validation (SSH, PHP and more)

General security hardening (unnecessary services, etc)

PHP configuration, checks and fixes dangerous settings

Apache configuration checks and fixes

DOS protection system

Rule updater for Mod_security, GRsecurity, HIDS, Self Healing and the Application Inventory system

Custom code for system hardening

Special ClamAV rules

Installing ASL

Installation Page

Quickstart Command Line Documentation

1) Help

Usage: asl [options]

  -bl  --blacklist <value>                 Add <ip> to Blacklist.
  -c   --config                            Configure ASL settings.
  -ck  --check                             Show list of updates.
  -dr  --disable-rule <value>              Disable modsec rule by signature ID.
       --vhost <value>                     Enable/Disable modsec rule by vhost
modifier.
  -dbl --domain-blacklist <value>          Add <domain> to spam blacklist.
  -er  --enable-rule <value>               Re-enable modsec rule by signature
ID.
  -f   --fix                               Fix and Repair mode.
  -l   --list                              List ASL modules.
  -m   --module <value>                    Run a specific module.
  -mbl --malware-blacklist <value>          Add <domain> to malware blacklist.
  -nc  --nocolor                           Disable Color.
  -pc  --permissions-check                 Check/Fix permissions on ASL
dirs/files.
       --reload-firewall                   Reload Firewall rules.
       --remove-blacklist <value>          Remove <ip> from Blacklist.
       --remove-domain-blacklist <value>   Remove <domain> from spam Blacklist.
       --remove-malware-blacklist <value>  Remove <domain> from malware
Blacklist.
       --remove-whitelist <value>          Remove <ip> from Whitelist.
  -rfp --report-false-positive <value>     Report false positive on <path>.
  -r   --return                            Prompt to continue.
  -s   --scan                              Scan mode.
       --show-alert <value>                Show alert using <path>.
  -t   --terse                             Terse mode used for reporting
  -ub  --unblock <value>                   Unblock <ip> from active response
system.
  -u   --update                            Update rules and signatures.
  -uf  --force-update                      Force update of rules and signatures.
  -v   --version                           Show version.
  -wl  --whitelist <value>                 Add <ip> to whitelist.
       --validate_gui                      Validate subscription

2) Update the rules and signatures databases

asl -u

2) Run a vulnerability scan

asl -s

3) Run a vulnerability scan, and fix vulnerabilities

asl -s -f

Configuration

ASL can be configured through the ASL GUI. Please see the ASL configuration page for documentation.

Reporting False Positives

See the Reporting False Positives page for details.

Application Inventory

The application inventory module is designed to identify applications installed on the system by analysing it's source code. It can be a very CPU intense operation and is configured by default to run once per day. ASL supports configuring the Application Inventory to run either Daily, Weekly, or with the following setting in /etc/asl/config

APPINV_CRON="daily"

Valid settings for this field are:

"daily"

"weekly"

"off"

Changing this setting in /etc/asl/config does *NOT* require a policy update with "asl -s -f".

ASL Web GUI Password Reset

To reset your password, run this command:

/var/asl/bin/asl-web-passwd your_user_name

ASL inside a VPS

All of the features of ASL work inside a VPS. VPS technologies, such as Virtuzzo or OpenVZ abstract a single kernel running on the host system and share it with all the VPS'. Therefore, a VPS does not have a kernel of its own, it uses the host systems kernel. If you are using a VPS on a server that is not running ASL you will see several important kernel vulnerabilities reported in your system. These vulnerabilities are real, and they can not be fixed from inside a VPS.

The ASL kernel, when used with VPS technologies, can only be installed on the host machine, this is because the VPS' themselves do not have their own kernel. This is not to be confused with Virtual Machine technologies such as VMWare, KVM, Xen and others. Those virtual machines do have their own kernel, and therefore the ASL kernel can be installed inside those virtual machines. VPS', however, do not have their own kernel, they share the single host machines kernel. To eliminate these vulnerabilities in a VPS the host server must be running ASL as well.

VPS's will also see "hidden processes" reported by ASL. This is also expected as the rootkit detection capabilities of ASL are seeing hidden processes from other VPS' running on the system. Therefore VPS customers that do not wish to get these alerts will need to turn off rootkit checks inside their VPS's. To do this modify this file:

just modify this file:

/var/ossec/etc/ossec.conf

Search for this:

 <rootcheck>

you should see something like this:

 <rootcheck>
 <rootkit_files>/var/ossec/etc/shared/rootkit_files.txt</rootkit_files>
 <rootkit_trojans>/var/ossec/etc/shared/rootkit_trojans.txt</rootkit_trojans>
 </rootcheck>

Check that to this:

 <rootcheck>
 <disabled>yes</disabled>
 </rootcheck>

You will also want to disable the hidden process checks in the VPS that are performed by rkhunter:

You want to edit this file:

/etc/rkhunter.conf

Look for this line:

 ENABLE_TESTS="all"

Change it to:

 #ENABLE_TESTS="all"

Then look for this line:

 #DISABLE_TESTS="suspscan hidden_procs deleted_files packet_cap_apps"

And change it to:

 DISABLE_TESTS="hidden_procs os_specific"

Do not disable these checks on the host server.

If you are not on a VPS, then reports of hidden process means you do in fact have hidden processes. That means you are running some root level process that is hiding a process, or your system was compromised at some point in the past, and ASL has detected that a rootkit is installed.

Difference between revisions of "ASL"

Revision as of 15:49, 8 February 2013

Contents