Open Source C Security Software for Linux

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

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  • 1
    Open source DKIM library, MTA filter implementation and associated tools.
    Leader badge
    Downloads: 99 This Week
    Last Update:
    See Project
  • 2
    TelcoChisel OS

    TelcoChisel OS

    Advanced Telecom Security Live Linux OS for 5G/4G Cellular Auditing, S

    TelcoChisel is an advanced, bootable live Linux operating system purpose-built for cellular security researchers, Software Defined Radio (SDR) engineers, and telecommunications penetration testers. Eliminating dependency conflicts and driver compilation issues, TelcoChisel delivers an out-of-the-box, carrier-grade laboratory equipped with 88 pre-configured telecommunications security tools across 10 specialized domains. Built on Ubuntu 24.04 LTS (Noble Numbat) with the Linux low-latency kernel (`linux-image-lowlatency`), lightweight XFCE4 desktop, and keyboard-driven i3 tiling window manager.
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    Downloads: 101 This Week
    Last Update:
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  • 3
    This program allows you to use SSH, TELNET, VNC, FTP and any other Internet application from behind HTTP(HTTPS) and SOCKS(4/5) proxy servers. This "proxifier" provides proxy server support to any app.
    Downloads: 20 This Week
    Last Update:
    See Project
  • 4
    Untangle
    Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, bandwidth control, captive portal, VPN, firewall, and more. Visit http://untangle.com
    Downloads: 10 This Week
    Last Update:
    See Project
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  • 5
    Liberté Linux

    Liberté Linux

    Liberté Linux: Mission-critical stealth communication

    Liberté Linux is a secure, lightweight, and easy to use Gentoo-based Linux distribution intended as a communication aid in hostile environments. Liberté installs on a USB key, and boots on any computer or laptop.
    Downloads: 10 This Week
    Last Update:
    See Project
  • 6
    RetroShare

    RetroShare

    [WARNING] Project has moved to http://github.com/Retroshare/Retroshare

    [IMPORTANT] Retroshare is now distributed on Github. Please go to http://retroshare.net to find the latest releases and sources. RetroShare is a cross-platform, secured and decentralized communication system. It lets you to securely chat, share photos, videos, and more with family and friends, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 7
    tcpick is a textmode sniffer; it tracks tcp streams, shows the status, reassembles and saves the data captured in files or displays them in the terminal in different modes (ascii, hex..). There is a color-mode. Useful to get files passively.
    Leader badge
    Downloads: 20 This Week
    Last Update:
    See Project
  • 8
    Secure Internet Live Conferencing

    Secure Internet Live Conferencing

    Secure chat and conferencing protocol

    See http://silcnet.org/ for detailed information. SILC provides common chat and conferencing services like private messages, instant messages, channels and groups, and video and audio conferencing. The main difference to other protocols is that SILC has been designed with security as its main feature. All packets and messages sent in SILC network are always encrypted. Private messages are encrypted end-to-end, channel message are encrypted with channel-wide secret key and secure file transfer is protected peer-to-peer.
    Leader badge
    Downloads: 27 This Week
    Last Update:
    See Project
  • 9

    The ASN.1 Compiler

    Go to github.com/vlm/asn1c for the latest version.

    This ASN.1 compiler turns ASN.1 specifications into C code. The asn1c is shipped together with conformant BER/DER/XER/PER codecs. The X.509, GSM TAP3, MEGACO, RRC and LDAP encoding and decoding examples are part of the source code distribution. NOTE: THE asn1c PROJECT HAS LARGELY MOVED TO GITHUB: http://github.com/vlm/asn1c
    Downloads: 4 This Week
    Last Update:
    See Project
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  • 10
    The Nemesis Project is designed to be a command line based, portable human IP stack for UNIX-like and Windows systems. The suite is broken down by protocol, and should allow for useful scripting of injected packets from simple shell scripts.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 11
    MailCleaner

    MailCleaner

    Anti Spam SMTP Gateway

    MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project https://github.com/SpamTagger [antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready. MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet. It includes a complete GNU/Linux OS and a graphical web interface for user and administrative access. It comes in the form of virtual machine templates.. - fully compatible with any SMTP mail server (Exchange, Zimbra, O365,...)
    Downloads: 2 This Week
    Last Update:
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  • 12
    Luadch

    Luadch

    We moved to GitHub! -> http://luadch.github.io/

    We moved to GitHub! New Website: http://luadch.github.io/ There you will find all the necessary informations.
    Leader badge
    Downloads: 9 This Week
    Last Update:
    See Project
  • 13

    opendmarc

    Open source DMARC implementation

    This is an open source implementation of the draft DMARC specification.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 14
    This project is a C++ library which allows incorporating DKIM into an existing MTA or other application. It provides full support for signing, verifying, and SSP. It is compliant with RFC 4871.
    Leader badge
    Downloads: 4 This Week
    Last Update:
    See Project
  • 15
    The LDAP proxy is designed to be the part of the email encryption infrastructure which would simplify finding and using public encryption keys contained in X.509 public certificates.
    Downloads: 5 This Week
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    See Project
  • 16
    raddump interprets captured RADIUS packets to print a timestamp, packet length, RADIUS packet type, source and destination hosts and ports, and included attribute names and values for each packet.
    Downloads: 4 This Week
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  • 17
    NOTE: dkim-milter has been replaced by OpenDKIM, available at http://opendkim.org/ dkim-milter consists of two parts: A milter-based application (dkim-filter) which plugs in to Sendmail to provide DomainKeys Identified Mail service, and a library (libdkim) which can be used to build DKIM-compliant applications or MTAs.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 18
    The libSRTP project has been moved to https://github.com/cisco/libsrtp
    Downloads: 1 This Week
    Last Update:
    See Project
  • 19
    AMaViS is a script that interfaces a mail transport agent (MTA) with virus scanners.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 20
    This project aims at full implementation of RFC4306 and associated RFCs. It is implemented as daemon process, as is custom for this type of software for Unix-like operating systems. Main target for daemon is Linux environment, specifically Fedora Core 5.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 21
    Mixmaster is an anonymous remailer. Remailers provide protection against traffic analysis and allow sending electronic mail anonymously or pseudonymously. Mixmaster consists of both client and server installations.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 22

    Rockhopper VPN software

    IPsec / IKEv2-based VPN software for Linux.

    Rockhopper is IPsec/IKEv2-based VPN software for Linux. This software is interoperable with Windows 7, Windows 8 and Windows 10 VPN clients and it provides a handy AJAX-based Web console to manage Secure Virtual Ethernet(LAN), Routing-based VPN, Remote Access VPN and servers protected by IPsec. No kernel modules are needed. The ESP protocol stack is also implemented in user space.
    Leader badge
    Downloads: 2 This Week
    Last Update:
    See Project
  • 23

    WendzelNNTPd

    A free Usenet server with SQL backend and RBAC.

    The WendzelNNTPd is a IPv6-ready NNTP usenet-server with the main goal to be as easy to use as possible. It is portable (Linux/*BSD/*nix), supports AUTHINFO authentication, contains ACL as well as role based ACL and supports invisible newsgroups. It currently supports MySQL and SQLite backends.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 24
    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: 2 This Week
    Last Update:
    See Project
  • 25
    A very basic single-threaded UDP server with optional support for DTLS.
    Downloads: 1 This Week
    Last Update:
    See Project