Free protection against viruses software for linux

• 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.

Qpopper project is the most widely-used server for the POP3 protocol (this allows users to access their mail using any POP3 client). Qpopper supports the latest standards, and includes a large number of optional features. Qpopper is normally used with standard UNIX mail transfer and delivery agents such as sendmail or smail.
Qpoppers goals are: security, stability, safety, features, and performance.
The 3 and later code base has multiple levels of protection again common security vulnerabilities, so even if there is a bug at one level, the other levels can protect against an exploit. Stability means running without crashing or other problems. All bug reports are reviewed and taken seriously.
Safety means protecting the users mail. Qpopper takes extra precautions to guard against spool corruption, even if there is a system crash or power failure during an update. Qpopper provides a large number of features, such as bulletins, support for wireless devices, APOP, integration with packages such as Kerberos, drac, etc.
Qpopper strives for the maximum possible performance consistent with safety. You can also tell Qpopper when it is running in an environment where some precautions are not required, resulting in extra performance (for example, if users do not access mail using shell accounts).
This server is fully compliant with RFC 1939 (which defines the POP protocol) and RFC 2449 (which defines the POP extension mechanism and the extended response codes), and works with all known POP3 clients.
Qpopper also supports Kerberos V4 and V5 if enabled.
Main features:
- Faster start-up (1,000 times faster, in many cases)
- Reduced I/O at session end (one-third less!)
- TLS/SSL (allows authentication and email to be strongly encrypted between any TLS/SSL-enabled mail client and Qpopper 4.0.5; requires TLS/SSL)
- Plus all the great features of Qpopper 3.1 (including full sources)
- Most compile-time options now are available at run-time
- Easier administration

IDND is a Firefox extension that puts a little flag in the status bar that tells you whether you are visiting a Traditional Domain Name (green TDN) or an International Domain Name (UN-blue IDN).

IDNs can be used for phishing or spoofing, so suspicious IDNs cause an optional alert box to appear further warning you to take care. This is in no way sufficient protection against all kinds of spoofing, but does add to your browsers defences.

In the status bar a green or blue flag shows whether the current page has a traditional (A-Z 0-9 -) or an international domain name. In this way you have more protection against homograph attacks.

MathGuard project is a PHP class that inserts a small piece of HTML code into your HTML form which requires the user to evaluate an expression consisting of two random numbers.
When user submits the form with the answer, the answer is hashed and compared to the security code that has been submitted as well. This way you can easily protect your forms from spambots.
Enhancements:
- This version features more complex rendering of the security question.
- This question now consists of small random letters directly inserted to HTML, instead of just writing the plain numbers into the source code of the Web page.
- This way, the protection against spambots is even stronger.

Arnos IPTABLES firewall script was initially written because I needed to protect my single-homed Linux machine at work. I wrote it at the time I couldnt find any script that really satisfied my needs except for one that was written by a guy called Seven.
I helped him for several months with the work on his script by suppling patches, reporting bugs etc. In this period I was fortunately also able to master scripting for iptables myself because soon Seven discontinued his work, I never got to even talk to the guy ever again. At that point I decided to continue his work, or actually I started my own branch based on his script.
In the summer of 2002 I finally got an ADSL connection at home. Initially I used the iptables firewall that came with the great ADSL4LINUX-package (http://www.adsl4linux.nl). But it didnt take me long to come to the conclusion that their iptables firewall lacked important features like port-forwarding and flexbility with "trusted hosts" etc.
I also didnt like the fact that I had to use a different firewall for my home machine and the machine at work. This made me decide to use some of the ADSL4LINUX knowledge to implement ADSL support.
By now (about 1 year later as of writing) there are only few remnants left of Sevens original script and many, many, many improvements were applied. One major improvement is the ADSL and NAT support (Check the features page with the specifiations of my firewall). For version 2 (alpha) I plan to completely rewrite to script to make it more flexible and to increase the usability for others.
Main features:
- Very secure stateful filtering firewall
- Both kernel 2.4 & 2.6 support
- It can be used for both single- and multi(eg. dual)-homed boxes
- Masquerading (NAT) and SNAT support
- Multiple external (internet) interfaces
- Support multiroute NAT & SNAT (load balancing over multiple (internet) interfaces)
- Port forwarding (NAT)
- Support MAC address filtering
- Support for DSL/ADSL modems
- Support for PPPoE, PPPoA and bridging modem setups
- Support for static and ISP assigned (DHCP) IPs
- Support for (transparent) proxies
- Full support for DMZs and DMZ-2-LAN forwarding. You can also use it to isolate your eg. wireless LAN.
- (Nmap)(stealth) portscan detection
- Protection against SYN-flooding (DoS attacks)
- Protection against ICMP-flooding (DoS attacks)
- Extensive user-definable logging with rate limiting to prevent log flooding
- Includes options to optimize your throughput
- User definable open ports, closed ports, trusted hosts, blocked hosts etc.
- Log & protection options are both highly customizable
- Support for custom iptables rules in a seperate file
- It can be used with chkconfig runlevel system (eg. RedHat/Fedora)
- Main focus on TCP/UDP/ICMP but additional support for *ALL* IP protocols
- It works with Freeswan IPSEC (VPN) & SSH Sentinel (http://www.freeswan.org) (+virtual IPs)
- It works with PoPTop PPTP (http://www.poptop.org)
- It works with UPnP
- DRDOS protection/detection (experimental)
- Its easy to configure
- And much more.
Enhancements:
- This release fixes a nasty bug in the NAT forwarding rules that caused using subnet-source-restrictions not to work.
- It adds an extra rule to the DHCP server section to allow packets from DHCP servers in the same segment.
- There are several plugin updates.
- A Racoon IPSEC VPN plugin and a transparent DNAT plugin have been added.

Monkeys Memory is an implementation of the classic game of memory. Classic Game of Memory written in mono where you can play against other people (on the same computer, network game is not implemented jet) or against Computer (there is 2 type of computer player).

There is more level of game from tiny level to very big one.

Attal: Lords of Doom is a strategy game still in development.

Its a turn-based strategy game, that can be played alone (against AI) or against other through a network (local or internet). Attal is available under Linux and Windows.