“The L0pht NFR Intrusion Detection System modules have been updated to cover some of the latest popular network attacks. Featured prominently in the update is a Back Orifice detection module which, we believe, is better than anything else on the market. Better than ISS’s RealSecure BO detection as well as that of stand alone BO detectors that cost upwards of $5000. Do your network a favor and download our IDS modules (which are FREE) and NFR which is free for internal, non-commercial use.”
You can download it from the following link: https://packetstormsecurity.com/files/download/12744/l0pht-nfr.tar.gz
Source: https://packetstormsecurity.com/files/12744/l0pht-nfr.tar.gz.html