Free protection software for linux

t-prot (TOFU Protection) is a filter which improves the readability of email messages and Usenet posts by hiding some of their annoying parts.
The annoyances it handles include mailing list footers, signatures, TOFU, sequences of blank lines, and repeated punctuation.
TOFU is an acronym that stands for "Text oben, Fullquote unten", a German reference to the practice of adding just a few lines of original text and quoting a complete message below them.
Enhancements:
- A new option was added to skip processing of very large and time-consuming messages.

• A Firewall with stateful packet inspection and application proxies guards Internet communications traffic in and out of the organization.
• A Virtual Private Network (VPN) gateway assures secure communications with remote offices, road warriors and telecommuters.
• Anti-Virus defends computers from both email and web-bourne viruses.
• Intrusion Protection detects and stops hostile probes and application-based attacks.
• Spam Filtering eliminates the productivity drain of opening and deleting unsolicited emails.
• Surf Protection (Content Filtering) and Spyware Protection improve productivity by blocking inappropriate web activities, provide full protection from user tracking threats and violation of privacy.

Major Features:

1. Protects all types of networks Windows, Linux, Unix and others.
2. Delivers comprehensive features at low cost maximizing your ROI (return on investment).
3. Highly effective. Has won numerous industry awards. Beat Cisco and Checkpoint in InfoWorld magazine product review, Beat IBM and Computer Associates in Linux World for Best Security Application.
4. Integrated management platform features an intuitive browser-based interface and one-step updates for rapid deployment and easy management.
5. Can be installed in under 15 minutes or purchased pre-installed on security appliances.
6. Can start with firewall, VPN and spam protection and add other security applications as needed, seamlessly.
7. Runs as a dedicated application server on top of a hardened operating system, which relieves operating system management headaches.
8. Runs on systems ranging from small devices up to large multi-processor systems utilizing gigabytes of memory.
9. Redundant systems can be configured to provide high availability and automatic failover in case of hardware or network failures.
10. Load balancing improves performance traffic shaping can set priorities by network, service and protocol.
11. Logging, automatic backup, and diagnostic tools support high reliability.
12. Free online evaluation workshop to get you started.

Enhancements:

• This Up2Date addresses a few issues that did not make the 7.4 GA version in time.
• This is a pure bugfix/stability release that strengthens the quality of your installation.

Transolution is a Computer Aided Translation (CAT) suite supporting the XLIFF standard. It provides the open source community with features and concepts that have been used by commercial offerings for years to improve translation efficiency and quality.
The suite is modular to make it flexible and provides a XLIFF Editor, translation memory engine and filters to convert different formats to and from XLIFF.
The use of XLIFF means that almost any content can be localized as long as there is a filter for it (XML, SGML, PO, RTF,StarOffice/OpenOffice).
A versatile translation editor for XLIFF files. It aims to provide translators with professional quality editor for both documentation and software. Features tag protection and interactive Translation Memory.
Main features:
- Versatile, can be used for both software and documentation
- Sentence segmentation
- Tag protection
- Interactive Translation Memory
- File format based on XLIFF standard
- Platform independent
- Open source (GPL License)

ProSum is a terminal based program that protects your files, sys_call_table and IDT like tripwire way (All in user space, without kernel modules).
In addition, database with files etc. could be encrypted with Blowfish algorythm and files that are protected could be store at any secure/bastion host to later replace them. You can disable sys_call_table and IDT support for Non-Linux systems. ProSum could be run on any UNIX system, at least with file protect mode (without IDT and sys_call_table support). ProSum was designed for if you run it on Linux x86 platform, kernel havent LKM support or have any type of protection against load and unload LKM, for many protection. Anyway this is not neccesary, but is recommended.
Main features:
- - IDT, Kernel Symbols and Syscall hacking protection throught /dev/kmem for Linux x86 (developing protection for Linux sparc).
- File protection in a Tripwire way on any UNIX POSIX compliant.
- Database encryption with Blowfish algorythm on any UNIX.
- Recover files which are protected from a bastion/secure host.
- Syscall hacking by method described on http://www.big.net.au/~silvio/stealth-syscall.txt protection.
Enhancements:
- INSTALL.es translated to english on INSTALL.en Support for extended flags on Linux.
- To run program you need password that you define in config_prosum.h
- User could be specify random seed for ivec to encrypt BBDD.
- Now encryption support works, tested on Linux, *BSD and Solaris.
- Fixed removing absolute path on snd_tcp_serv.c
- Now you can compile program without gettext support with --disable-nls
- OpenSSL API have been removed for encryption support because there are many problems with it and non-Linux systems, and API of GnuPG 1.0.7 have been added.
- Fixed malfunctions with GNU make.
- Now you can protect files from different hosts in an unique bastion host.
- Now you can protect files that starting by a point (.).
- Added protection against kernel symbols hacking on Linux x86.
- Fixed BUG on big endianess architecture machines with htons() and md5.
- Fixed BUG with getopt().
- Fixed BUG when program comprobes if file were symbolic link.
- Internal code reestructuration.
- Fixed return type of signal() for portability.
- Changed way for handling errors.
- Added lock file for prevent that more than one ProSum can be running at the same me.

NetSecL (previously known as ISlack) is a security-focused Linux distribution.
It includes Grsecurity by default. Most of the numerous security-related software is suited for penetration testing of your network.
There are also security tools for testing your local security and IDSs for monitoring.
The configuration of NetSecL is hardened by default: (listening for connection) services are turned off, and incoming ports are closed.
Enhancements:
- This release introduces GCC with Stack Smashing Protection, which increases the security of the compiled packages (i486_64).
- There are more than 250 Package Updates.
- Most networking packages are now i486_64 packages.
- This release fixes some unnoticed bugs in the 2.0 version.
- Hardware recognition data was updated to the latest available.

Gemini project is an advanced multi-platform, standards compliant, messaging client with powerful features for managing mail and news from multiple sources.

Gemini provides flexible filtering of messages and protection from junk mail, viruses and common breaches of netiquette, in an attractive interface which is easy to use yet hides nothing from the more advanced user.

Additional features include message templates, auto-replies, support for multiple identities, HTML, IMAP, SSL, editing of stored messages, spell checking, syntax colouring, mailing lists as newsgroups, calendar/task management and encryption/signing via integration with GnuPG.

About AVG Anti-Virus:

• AVG Professional Single Edition is perfectly designed to give you the maximum antivirus protection for your single home PC or workstation.
• It is simple to install and operate. No IT expertise is required and it can run in the background, providing uninterrupted protection. All file and e-mail activity is checked automatically, allowing you to get on with your work without worrying about viruses.
• It is extremely fast, reliable and light on resources, so, no matter how demanding a user you are, it will not slow down your performance.

Enhancements: Added detection of new variants of trojans SHeur2.ANNO, BackDoor.Hupigon5.LCW, SHeur2.ANOR, Downloader.Generic8.AXOI, PSW.Banker5.ONF, Generic13.BPUS.