Probably the biggest change in Network Security Toolkit (NST) 24-7977 is the fact that the Fedora-based Linux distribution is now offered as an ISO image only for modern, 64-bit computers. Yes, that’s right, following the latest trends, the NST developers decided to drop support for 32-bit platforms. Network Security Toolkit now comes with a new Multi-Traceroute (MTR) networking tool integrated directly into the web-based interface, designed to offer you an interactive Traceroute visual using Scapy.