FTester - Firewall Tester and IDS Testing tool

The Firewall Tester (FTester) is a tool designed for testing firewalls filtering policies and Intrusion Detection System (IDS) capabilities.

The tool consists of two perl scripts, a packet injector (ftest) and the listening sniffer (ftestd). The first script injects custom packets, defined in ftest.conf, with a signature in the data part while the sniffer listens for such marked packets. The scripts both write a log file which is in the same form for both scripts. A diff of the two produced files (ftest.log and ftestd.log) shows the packets that were unable to reach the sniffer due to filtering rules if these two scripts are ran on hosts placed on two different sides of a firewall. Stateful inspection firewalls are handled with the ‘connection spoofing’ option. A script called freport is also available for automatically parse the log files.

Of course this is not an automated process, ftest.conf must be crafted for every different situation. Examples and rules are included in the attached configuration file.

The IDS (Intrusion Detection System) testing feature can be used either with ftest only or with the additional support of ftestd for handling stateful inspection IDS, ftest can also use common IDS evasion techniques. Instead of using the configuration syntax currently the script can also process snort rule definition file.

Features:

• Firewall testing
• IDS testing
• Simulation of real TCP connections for stateful inspection firewalls and IDS
• Connection spoofing
• IP fragmentation / TCP segmentation
• IDS evasion techniques

Requirements:

The following PERL modules are required: Net::RawIP, Net::PcapUtils, NetPacket

You can download FTester here:

ftester-1.0.tar.gz

Or you can read more here.

Open Source Intrusion Prevention - HLBR

It’s good to see work on open source tools in the countermeasure department aswell as the attack and penetration arena.

It’s a shame since Snort and Nessus have gone semi-commercial.

I hope more people invest their time in good IDS, Firewall and IPS systems, I love things like IPCop and hope to see more products like HLBR.

HLBR is a brazilian project, started in november 2005, as a fork of the Hogwash project (started by Jason Larsen in 1996)

HLBR is an IPS (Intrusion Prevention System) that can filter packets directly in the layer 2 of the OSI model (so the machine doesn’t need even an IP address). Detection of malicious/anomalous traffic is done by rules based in signatures, and the user can add more rules. It is an efficient and versatile IPS, and it can even be used as bridge to honeypots and honeynets. Since it doesn’t make use of the operating system’s TCP/IP stack, it can be “invisible” to network access and attackers.

Since version 1.0, released in march 5th 2006, HLBR can use regular expressions to detect intrusion attempts, virus, worms, and phishing.

You can view the entire HLBR README file here.

Go to the HLBR Homepage for more information and downloads.

Security Layer & Intrusion Detection for PHP Based Web Applications

Another protection for those building website and web applications, as it’s the the most common attack vector nowadays I think it’s important to be extra safe on this front.

PHPIDS (PHP-Intrusion Detection System) is a simple to use, well structured, fast and state-of-the-art security layer for your PHP based web application. The IDS neither strips, sanitizes nor filters any malicious input, it simply recognizes when an attacker tries to break your site and reacts in exactly the way you want it to. Based on a set of approved and heavily tested filter rules any attack is given a numerical impact rating which makes it easy to decide what kind of action should follow the hacking attempt.

This could range from simple logging to sending out an emergency mail to the development team, displaying a warning message for the attacker or even ending the user’s session.

PHPIDS enables you to see who’s attacking your site and how and all without the tedious trawling of logfiles or searching hacker forums for your domain. Last but not least it’s licensed under the LGPL!

It’s a fairly mature product with some good documentation (docs are here) and it’s easily to programmatically grab the latest version of the filter rules (it’s just an xml file).

You can see a demo here were you can try some injections or XSS and see the warnings.

http://demo.php-ids.org/

Download the latest version of PHPIDS here:

PHPIDS 0.4.6 zip
PHPIDS 0.4.6 tar.gz

There are other versons for Drupal and Wordpress on the download page.

Or read more here.

.NET Intrusion Detection System

This tool is another one on the side of protection, again for web-based applications but this time for .NET applications it’s called .NETIDS (.NET Intrusion detection System). This tool is capable of detecting on attacks on web applications and gives the developer the possibility to react. The project files include filter rules and function stubs to react on possible intrusions which may vary from logging to warning or redirecting the user.

The goal of this project is to provide am additional layer of protection to any .NET application this project is used with. This also includes the detection of XSS, directory traversal, SQL injections, protection against overwriting JS objects and methods, advanced logging functions, categorization and tagging of the single filter rules and interfaces for reacting on possible intrusions.

.NET IDS is a actually a port of PHPIDS, which we’ve mentioned before, to the .NET Framework. The library is fully CLS compliant and implements exactly the same filtering sets as the PHP version.

.NETIDS can be used in three ways.

The first method is by inheriting your ASP.NET pages from the SecurePage class. This offers an easy and customizable way to scan page input. If you are relatively new to the .NET Framework this is the simplest way to secure your applications.

The second method is more customizable but harder to implement for novice programmers and involves working directly with the IDS objects.

The third method (available in the upcoming release) is by using the supplied HttpModule.

You can find the documentation here:

http://www.the-mice.co.uk/dotnetids/docs/

You can download .NET IDS v.0.1.3.0 here:

dotnetids-bin-0_1_3_0.zip

Or you can read more here.