Scanrand is a proof of concept, investigating stateless manipulation of the TCP Finite State Machine. It implements extremely fast and efficient port, host, and network trace scanning, and does so with two completely separate and disconnected processes — one that sends queries, the other that receives responses and reconstructs the original message from the returned [...]

Widely popular Open Source webserver scanner, Nikito, released a new version of this insanely handy tool for hackers, sysadmin, crackers, phreakers and whatnot. Nikto is not only a free webserver scanner but the one of the leading, even among commercial, scanners out there. Here is a short description from Nikito site: http://www.cirt.net/code/nikto.shtml Nikto is an [...]

Sipcalc, in it’s simplest form takes an ip-address and a subnet mask on the commandline and outputs information about the subnet. Sipcalc has support for both IPv4 and IPv6 addresses. Sipcalc can take input in three forms, an ip-address/netmask, an interface or via stdin using the special character -. Sipcalc output is divided into sections [...]

scanlogd detects port scans and writes one line per scan via the syslog mechanism. If a source address sends multiple packets to different ports in a short time, the event will be logged. In order to do its job, scanlogd needs a way to obtain raw IP packets that either come to the system scanlogd [...]