SecTools.Org: Top 125 Network Security Tools

For more than a decade, the Nmap Project has been cataloguing the network security community's favorite tools. In 2011 this site became much more dynamic, offering ratings, reviews, searching, sorting, and a new tool suggestion form. This site allows open source and commercial tools on any platform, except those tools that we maintain (such as the Nmap Security Scanner, Ncat network connector, and Nping packet manipulator).

We're very impressed by the collective smarts of the security community and we highly recommend reading the whole list and investigating any tools you are unfamiliar with. Click any tool name for more details on that particular application, including the chance to read (and write) reviews. Many site elements are explained by tool tips if you hover your mouse over them. Enjoy!

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(1) ★★★★★ VMware (#43, 46)

VMware virtualization software lets you run one operating system within another. This is quite useful for security researchers who commonly need to test code, exploits, etc on multiple platforms. It only runs on Windows and Linux as the host OS, but pretty much any x86 or x86_64 OS will run inside the virtualized environment. It is also useful for setting up sandboxes. You can browse from within a VMware window so the even if you are infected with malware, it cannot reach your host OS. And recovering the guest OS is as simple as loading a "snapshot" from prior to the infection. VMware player (executes, but can't create OS images) and VMWare Server (partitions a physical server machine into multiple virtual machines) were recently released for free. An open-source alternative is VirtualBox. Xen is a Linux-specific virtualization system. Read 1 review.

Latest release: version 12.0.0 on Aug. 24, 2015 (8 years, 7 months ago).

(2) ★★★ OllyDbg (#44, 49)

OllyDbg is a 32-bit assembler level analyzing debugger for Microsoft Windows. Emphasis on binary code analysis makes it particularly useful in cases where source is unavailable. OllyDbg features an intuitive user interface, advanced code analysis capable of recognizing procedures, loops, API calls, switches, tables, constants and strings, an ability to attach to a running program, and good multi-thread support. OllyDbg is free to download and use but no source code is provided. Read 2 reviews.

Latest release: version 2.01 on Sept. 27, 2013 (10 years, 6 months ago).

(2) ★★★ Ntop (#45, 9)

Ntop shows network usage in a way similar to what top does for processes. In interactive mode, it displays the network status on the user's terminal. In Web mode, it acts as a Web server, creating an HTML dump of the network status. It sports a NetFlow/sFlow emitter/collector, an HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics. Read 2 reviews.

Latest release: version 4.0.3 on Oct. 24, 2010 (13 years, 5 months ago).

(3) ★★★ MBSA (#46, 54)

Microsoft Baseline Security Analyzer (MBSA) is an easy-to-use tool designed for the IT professional that helps small and medium-sized businesses determine their security state in accordance with Microsoft security recommendations and offers specific remediation guidance. Built on the Windows Update Agent and Microsoft Update infrastructure, MBSA ensures consistency with other Microsoft management products including Microsoft Update (MU), Windows Server Update Services (WSUS), Systems Management Server (SMS) and Microsoft Operations Manager (MOM). Apparently MBSA on average scans over 3 million computers each week. Read 3 reviews.

Latest release: version 2.3 on Nov. 12, 2013 (10 years, 4 months ago).

(2) ★★★★ AppScan (#47, 51)

AppScan provides security testing throughout the application development lifecycle, easing unit testing and security assurance early in the development phase. Appscan scans for many common vulnerabilities, such as cross site scripting, HTTP response splitting, parameter tampering, hidden field manipulation, backdoors/debug options, buffer overflows and more. AppScan was merged into IBM's Rational division after IBM purchased its original developer (Watchfire) in 2007. Read 2 reviews.

Latest release: version 8.5 on Nov. 15, 2011 (12 years, 4 months ago).

no rating OpenSSL (#50, 9)

The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and open source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. Apart from being a component of many crypto programs, OpenSSL comes with a lot of command-line tools for encryption, hashing, certificate handling, and more. Review this tool.

Latest release: version 1.0.2d on July 9, 2015 (8 years, 8 months ago).

(1) ★★★★★ Canvas (#51, 37)

Canvas is a commercial vulnerability exploitation tool from Dave Aitel's ImmunitySec. It includes more than 370 exploits and is less expensive than Core Impact or the commercial versions of Metasploit. It comes with full source code, and occasionally even includes zero-day exploits. Read 1 review.

Latest release: version 6.73 on Oct. 26, 2011 (12 years, 5 months ago).

(1) ★★★ fgdump (#52, 5)

fgdump is a newer version of the pwdump tool for extracting NTLM and LanMan password hashes from Windows. It is also capable of displaying password histories if they are available. It outputs the data in L0phtCrack-compatible form, and can write to an output file. fgdump attempts to disable antivirus software before running. It then runs pwdump, cachedump (cached credentials dump), and pstgdump (protected storage dump). Read 1 review.

Latest release: version 2.1.0 on Sept. 18, 2008 (15 years, 6 months ago).

(1) ★★★★★ Tor (#53, 6)

Tor is a network of virtual tunnels designed to improve privacy and security on the Internet by routing your requests through a series of intermediate machines. It uses a normal proxy server interface so that ordinary Internet applications like web browsers and chat programs can be configured to use it. In addition to helping preserve users' anonymity, Tor can help evade firewall restrictions. Tor's hidden services allow users publish web sites and other services without revealing their identity or location. For a free cross-platform GUI, users recommend Vidalia. Remember that Tor exit nodes are sometimes run by malicious parties and can sniff your traffic, so avoid authenticating using insecure network protocols (such as non-SSL web sites and mail servers). That is always dangerous, but particularly bad when routing through Tor. Read 1 review.

Latest release: version 0.2.6.10 on July 12, 2015 (8 years, 8 months ago).

(1) ★★★ Retina (#54, 29)

Like Nessus, Retina's function is to scan all the hosts on a network and report on any vulnerabilities found. It was written by eEye, who are well known for their security research. Read 2 reviews.

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