Nmap ("Network Mapper") is a free and open source utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service ...

BackTrack is the most Top rated linux live distribution focused on penetration testing. With no installation whatsoever, the analysis platform is started directly from the CD-Rom and is fully accessible within minutes. It's evolved from the merge of the two ...

lsof is a Unix-specific diagnostic tool. Its name stands for LiSt Open Files, and it does just that. It lists information about any files that are open by processes currently running on the system. It can also list communications open ...

WhoB is a likable whois client designed to provide everything a network engineer needs to know about a routed IP address by typing one line and reading one line. But even so, it's worth typing a few more lines because ...

Firefox plugin by Jan Dittmer. Shows the IP address of the current page in the status bar. It also allows querying custom services by IP (right mouse button) and Hostname (left mouse button), like whois, netcraft. Additionally you can copy ...

Amap is a next-generation tool for assisting network penetration testing. It performs fast and reliable application protocol detection, independent on the TCP/UDP port they are being bound to.

GFI LANguard Network Security Scanner (N.S.S.) is an award-winning solution that allows you to scan, detect, assess and rectify any security vulnerabilities on your network. As an administrator, you often have to deal separately with problems related to vulnerability issues, ...

An aspect of Windows NT/2000/XP network security that's often overlooked is file shares. A common security flaw occurs when users define file shares with lax security, allowing unauthorized users to see sensitive files. There are no built-in tools to list ...

The NTFS file system provides applications the ability to create alternate data streams of information. By default, all data is stored in a file's main unnamed data stream, but by using the syntax 'file:stream', you are able to read and ...

Active Directory Explorer (AD Explorer) is an advanced Active Directory (AD) viewer and editor. You can use AD Explorer to easily navigate an AD database, define favorite locations, view object properties and attributes without having to open dialog boxes, edit ...

In current IT security environments, files and services are often password protected. In certain situations it is required to get access to files and/or data even when they are protected and the password is unknown. wyd.pl was born of those ...

Wellenreiter is a wireless network discovery and auditing tool. Prism2, Lucent, and Cisco based cards are supported. It is one of the easiest to use linux wireless scanning tools available. No card configuration has to be done anymore. The whole ...

P0f v2 is a versatile passive OS fingerprinting tool. P0f can identify the operating system on machines that connect to your box (SYN mode), machines you connect to (SYN+ACK mode), machine you cannot connect to (RST+ mode), and machines whose ...

cdpr is used to decode a Cisco Disovery Protocol (CDP) packet, by default it will report the device ID, the IP Address (of the device), and the port number that the machine is connected to. Optionally it will decode the ...

NBTscan is a program for scanning IP networks for NetBIOS name information. It sends NetBIOS status query to each address in supplied range and lists received information in human readable form. For each responded host it lists IP address, NetBIOS ...

Written and maintained by Fyodor Yarochkin, Meder Kydyraliev and Ofir Arkin, Xprobe (I & II) is an active OS fingerprinting tools based on Ofir Arkin’s ICMP Usage In Scanning Research project.Xprobe is an alternative to some tools which are heavily ...

A successor to pwdump, fgdump can be used to dump user info from local and remote Windows boxes, given administrator privileges.

KisMAC is an opensource and free stumbler/scanner application for Mac OS X. It has an advantage over MacStumbler, iStumbler, and NetStumbler in that it uses monitor mode and passive scanning. KisMAC supports several third party PCMCIA cards - Orinoco, PrismII, ...

Angry IP Scanner is an open-source and cross-platform network scanner designed to be fast and simple to use. It scans IP addresses and ports as well as has many other features. It is widely used by network administrators and just ...

ike-scan is a command-line tool that uses the IKE protocol to discover, fingerprint and test IPsec VPN servers.