Maltrail Malicious Traffic Detection System
Maltrail is a Malicious Traffic Detection System that utilizes publicly available blacklists (and other trails from various AV reports and user-defined lists) to help discover unknown threats by monitoring traffic against those lists. Maltrail is run from the command line but does include a handy (and optional) web interface.
If you take the security of your servers and computers really seriously, then you know how important it is to be constantly alert to malicious behavior. This can be a 24/7/365 job, and if you have a lot of equipment, this task is almost impossible. Fortunately, there are a number of useful tools available that reduce this burden considerably. Such a tool is Maltrail.