Jigsaw Security has made available a virtualized community edition of our sensor that detects threats. This version will not stop attacks (You'll need the licensed version for that) but it will alert you to attackers on your network and act as a DNS server for your LAN.
The sensor is per-configured to detect threats and alert you as an administrator.
The username for the sensor web interface is "demo" with "demo" as the password and "jigsaw" with a password of "firstwatch" for the OVA file.
This community edition is used to evaluate what the sensor does without giving you the most up to date Threat Intelligence and Hueristics detection modules available in our commercial version.
Click here to download the VirtualBox image.