Browse free open source Security software and projects for Server Operating Systems and Linux below. Use the toggles on the left to filter open source Security software by OS, license, language, programming language, and project status.

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    Build Securely on AWS with Proven Frameworks

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  • 1
    KeePass

    KeePass

    A lightweight and easy-to-use password manager

    KeePass Password Safe is a free, open source, lightweight, and easy-to-use password manager for Windows, Linux and Mac OS X, with ports for Android, iPhone/iPad and other mobile devices. With so many passwords to remember and the need to vary passwords to protect your valuable data, it’s nice to have KeePass to manage your passwords in a secure way. KeePass puts all your passwords in a highly encrypted database and locks them with one master key or a key file. As a result, you only have to remember one single master password or select the key file to unlock the whole database. And the databases are encrypted using the best and most secure encryption algorithms currently known, AES and Twofish. See our features page for details.
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    Downloads: 192,304 This Week
    Last Update:
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  • 2
    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server implements multiple spam filters

    The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261. A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are also available for download. NOTICE: V1 development has been stopped at the end of 2014 (1.10.1 build 16060). Possibly there will be done some bugfixing in future. Please upgrade to V2, which is and will be actively maintained.
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    Downloads: 47,694 This Week
    Last Update:
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  • 3
    Cntlm is an NTLM / NTLMv2 authenticating HTTP/1.1 proxy. It caches auth'd connections for reuse, offers TCP/IP tunneling (port forwarding) thru parent proxy and much much more. It's in C, very fast and resource-efficient. Go to http://cntlm.sf.net/
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    Downloads: 541 This Week
    Last Update:
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  • 4
    AWStats

    AWStats

    AWStats Log Analyzer

    AWStats is a free powerful and featureful server logfile analyzer that shows you all your Web/Mail/FTP statistics including visits, unique visitors, pages, hits, rush hours, os, browsers, search engines, keywords, robots visits, broken links and more
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    Downloads: 309 This Week
    Last Update:
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  • MongoDB Atlas | Run databases anywhere Icon
    MongoDB Atlas | Run databases anywhere

    Ensure the availability of your data with coverage across AWS, Azure, and GCP on MongoDB Atlas—the multi-cloud database for every enterprise.

    MongoDB Atlas allows you to build and run modern applications across 125+ cloud regions, spanning AWS, Azure, and Google Cloud. Its multi-cloud clusters enable seamless data distribution and automated failover between cloud providers, ensuring high availability and flexibility without added complexity.
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  • 5
    FileVerifier++
    FileVerifier++ is a Windows utility for calculating hashes using a number of algorithms including CRC32, MD5, SHA-1, SHA-256/224/384/512, WHIRLPOOL, and RIPEMD-128/160/256/320. Supported hash file formats include MD5SUM .MD5, SFV, BSD CKSUM, and others.
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    Downloads: 46 This Week
    Last Update:
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  • 6
    Output spool reader for Snort! This program decouples output overhead from the Snort network intrusion detection system and allows Snort to run at full speed. It takes input and output plugins and can therefore be used to convert almost any spooled fil
    Downloads: 10 This Week
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  • 7
    File system/directory monitoring utilities with loggin and task processing support (can execute files or make a WCF service call). Multiple configuration options. Source code libraries can be used to create a custom file system monitor.
    Downloads: 9 This Week
    Last Update:
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  • 8
    The OVAL Interpreter is a freely available reference implementation that demonstrates the evaluation of OVAL Definitions. Based on a set of OVAL Definitions the interpreter collects system information, evaluates it, and generates a detailed OVAL Results file. Developed to demonstrate the usability of OVAL Definitions and to ensure correct syntax and adherence to the OVAL Schemas by definition writers, it is not a fully functional scanning tool nor an enterprise scanning tool. It is a simplistic, command-line application that has the ability to execute OVAL Content on an end system. To learn more about organizations that provide OVAL content and tools or otherwise support the OVAL Language, please see the OVAL Adoption Program (http://oval.mitre.org/adoption/).
    Downloads: 7 This Week
    Last Update:
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  • 9
    Logsurfer is a program for monitoring system logs in real-time, and reporting on the occurrence of events. It is capable of grouping information together to enhance loganalysis and create automatic reports.
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    Downloads: 15 This Week
    Last Update:
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  • 10
    The purpose of the tool is to perform fingerprinting of remote TCP/IP stacks based on Ofir Arkin's ICMP fingerprinting research. This tool is a practical implementation of results discovered during 'project X' http://www.sys-security.com/index.php
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    Downloads: 11 This Week
    Last Update:
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  • 11
    mac-robber is a digital forensics and incident response tool that can be used with The Sleuth Kit to create a timeline of file activity for mounted file systems.
    Downloads: 10 This Week
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  • 12
    NewPKI is a PKI based on the OpenSSL low-level API, all the datas are handled through a database, which provides a much more flexible PKI than with OpenSSL, such as seeking a certificate with a search engine.
    Downloads: 16 This Week
    Last Update:
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  • 13
    Access Point Utilites for Unix - it's a set of utilites to configure and monitor Wireless Access Points under Unix using SNMP protocol. Utilites knownly compiles and run under Linux, FreeBSD, NetBSD, OpenBSD, MacOS-X, AIX, QNX.
    Downloads: 13 This Week
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  • 14
    ClamSAP exists of two 'C' shared libraries which link between ClamAV and the Virus Scan Interface (VSI) of SAP (offical name: NW-VSI). A SAP application can use the ClamAV engine to scan for malicious uploads in HTTP uploads for example.
    Downloads: 9 This Week
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  • 15
    dk-milter consists of two parts: A milter-based application (dk-filter) which plugs in to Sendmail to provide DomainKeys service, and a library (libdk) which can be used to build DomainKeys-compliant applications or MTAs. See the home page for details.
    Downloads: 8 This Week
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  • 16
    Privacy and Anonymity in the Internet

    Privacy and Anonymity in the Internet

    System for anonymous Web browsing

    Our goal is to develop, implement, evaluate and provide a secure and scaleable technical infrastructure for anonymous communication. This project is supported by Deutsche Forschungsgemeinschaft (DFG).
    Downloads: 2 This Week
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  • 17
    Tyrant SQL

    Tyrant SQL

    Tyrant SQL is a Havij based cross-platform. It's Sqlmap's gui version.

    It's a poweful Sql Injection Tool. It's a GUI version of SqlMap, saving time and getting better results. Was designed basing on Havij.
    Downloads: 4 This Week
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    See Project
  • 18
    psyBNC is an easy-to-use, multi-user, permanent IRC-Bouncer with many features. Some of its features include symmetric ciphering of talk and connections (Blowfish and IDEA) It compiles on Linux, FreeBSD, SunOs and Solaris.
    Downloads: 4 This Week
    Last Update:
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  • 19
    IBM's Software Trusted Platform Module (TPM) includes a TPM 1.2 implementation, low level demo libraries and command line tools, a TPM test suite, and proxies to connect from a TCP/IP socket to a hardware TPM. tpm4769 is the latest version, with TPM side support for OpenSSL 1.1. The utilities and test suite have not been ported to OpenSSL 1.1. They remain at 1.0. For the SW TPM 2.0, see https://sourceforge.net/projects/ibmswtpm2/. TPM 1.2 and TPM 2.0 are not software compatible.
    Leader badge
    Downloads: 3 This Week
    Last Update:
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  • 20
    Logcheck is software package that is designed to automatically run and check system log files for security violations and unusual activity. Logcheck utilizes a program called logtail that remembers the last position it read from in a log file.
    Downloads: 1 This Week
    Last Update:
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  • 21
    Nast is a packet sniffer and a LAN analyzer. It sniff packets and save data in files, checks NIC in promisc mode,build LAN hosts list, find a gw,performs a port scanning, catchs daemon banner etc... It also provides a GTK/ncurses interface.
    Downloads: 2 This Week
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    See Project
  • 22
    Generic clustering/load-balancing platform (over a LAN or internet) using java based P2P Aorta workers that execute java "tasklets". Various tasklets can be implemented to solve fractals, process images, render webpages, crack RSA "brute force".
    Downloads: 1 This Week
    Last Update:
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  • 23
    No-Name Instant Messenger is a secure (strong cryptography), cross platform communications program that supports existing IM networks (AIM, Yahoo, ICQ, etc.).
    Downloads: 1 This Week
    Last Update:
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  • 24
    Efficient open proxy scanner software suite for Undernet IRC(u).
    Downloads: 1 This Week
    Last Update:
    See Project
  • 25
    Automated Computer Auditing Daemon - Keep a track of what's going on with your systems: suid, sgid, world writable, hidden and unowned files monitoring as well as important file's md5sums management audits sent to your mailbox on a regular basis.
    Downloads: 0 This Week
    Last Update:
    See Project
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