DSA is another golden oldie - a predecessor to Private Firewall. I used it for many years & want to give it another trial against some contemporary nasties. I still have SDA 1.0 but have somehow lost my SDA 2.x. If anyone knows where I can download it, I would be very grateful. BACKGROUND: I always found SDA's approach to security to be an interestingly *different* approach. Namely, after installing SDA, you would then train it to become accustomed to your specific computer and the specific way in which you used it over a representative period of time. You set the training period. I usually set it for 14 days. During the training period, SDA would learn your norms for email traffic, each process's cpu average usage, etc. When the training period was over, SDA would thereafter alert you to any major deviations from these norms. You could set the sensitivity for these alerts by prescribing "maximum allowable percentage deviation from norm." AFAIK none of my current security programs is doing just exactly the same job as SDA's anomaly monitors. At least ... that's my theory. So -- inasmuch as I am retired & have a bit of time on my hands -- I want to see what value (if any) SDA may have for the here & now. REPEAT: If anyone knows where I can download SDA 2.x, I would be very grateful. If I can't get a later version of SDA, I shall (in a week or so) go with my 1.0, but I do hope someone can put me on the trail of 2.x.