September 25, 2012, 11:36 AM — Security software developers have a long history of making their work available for free. Here's a small taste, keeping in mind a few caveats, like uncertain support or limited capabilities relative to paid products.
One of the biggest "free" segments in security is antivirus freeware, such as that from Avira and Avast, as well as Microsoft Security Essentials, which got rave reviews in the June issue of Consumer Reports this year. However, the popular magazine also advised that "pay suites" for desktop malware are more full-featured and easier to use.
Another type of free security software is a desktop firewall offered by ZoneAlarm.
The A/V freeware genre is huge but it's mainly consumer-oriented. However, there are plenty of sophisticated tools the corporate network manager can try. Among them:
The Arpwatch bandwidth monitoring tool; Cheops, the network tool mapper; Hydra network login cracker to test for weak passwords; SNMP Brute, a tool for brute-force password attacks; the Wireshark open-source packet analyzer; and Kismet, a wireless network detector, sniffer and intrusion-detection system.
After all, if hackers get to play with these for free to try and overpower your network defenses, why shouldn't you find out what they can find out?