59 Open Source Tools That Can Replace Popular Security Software: Page 4

This iptables-based firewall can be used to create simple or very complex firewall configurations. Key features include remote administration via SSH, traffic shaping and powerful monitoring capabilities. Operating System: Linux.

47. m0n0wall Replaces Barricuda NG Firewall

Like most of the other apps in this category, m0n0wall allows you to create your own firewall, but unlike most of the other firewalls here, this one runs on FreeBSD, not Linux. It occupies just 12MB and can be loaded from a compact flash card or a CD. Operating System: FreeBSD.

48. pfSense Replaces Barricuda NG Firewall

This project is a fork of m0n0wall. While m0n0wall was created to be used on embedded hardware, pfSense was designed to make it easier to use on a full PC. It's been downloaded more than 1 million times and protects networks of all sizes from home users to large corporations. Operating System: FreeBSD.

49. Vyatta Replaces Cisco products

Vyatta actively markets its products as an alternative to Cisco, and even offers a comparison chart on its site. The "core" open source software can be used to create your own firewall/networking appliances, or you can purchase supported versions of the software or pre-built hardware appliances. Operating System: Linux.

Network Monitoring

The self-proclaimed "world's foremost network protocol analyzer," Wireshark has won quite a few awards and become a standard in the industry. It allows users to capture and view the traffic on their networks. Operating System: Windows, Linux, OS X.

51. tcpdump/libpcap Replaces: OmniPeek, CommView,

These command line tools provide packet capture (libpcap) and analysis (tcpdump) capabilities. It's a powerful tool, but not particularly user-friendly. Operating System: Linux.

52. WinDump Replaces: OmniPeek, CommView

WinDump ports the tcpdump tools so they can be used on Windows systems. The project is managed by the same company that owns Wireshark. Operating System: Windows.

Password Crackers

For those occasions when passwords can't be recovered any other way, Ophcrack can help systems administrators figure out lost passwords. It uses the rainbow tables method to crack passwords, and it can run directly from a CD. Operating System: Windows.

54. Access Data Password Recovery Toolkit, Passware

John the Ripper excels at cracking weak Unix passwords. To use it, you'll need a list of commonly used passwords. You can buy password lists or enhanced versions of the software from the site. Operating System: Windows, Linux, OS X.

Password Management

Instead of struggling to remember dozens of different passwords or, even worse, using the same password all the time, you can remember just one master password while KeePass stores the rest in a secure database. It's lightweight and easy-to-use, so it won't slow you down. Operating System: Windows.

56. KeePassX Replaces Kaspersky Password Manager

Originally, this project ported KeePass so that it could be used with Linux. Now, it supports multiple operating systems and adds a few features not in the original KeePass. Operating System: Windows, Linux, OS X.

57. Password Safe Replaces Kaspersky Password Manager

Password Safe offers the same functionality as KeePass, plus you can create multiple databases for different types of passwords or different people who use the same system. It's also available in a thumb-drive version for a fee. Operating System: Windows.

User Authentication

Designed to be less-expensive than solutions that require hardware tokens, WiKID uses software tokens to provide two-factor authentication. In addition to the free community version, it's also available in an enterprise version that's priced per user. Operating System: OS Independent.

Web Filtering

DansGuardian runs on a Linux or OS X server to block objectionable content from any PC connected to the network (including Windows PCs). It uses URL and domain filtering, content phrase filtering, PICS filtering, MIME filtering, file extension filtering and POST limiting to block pornography and other content that you don't want your children or employees accessing. Operating System: Linux, OS X.