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ZONES, NETWORKS, HOSTS and GROUPS definitions. Filter rules definitions based on services. New services definitions. NAT (Network Address Translation) Masquerading.
Where can I download a free firewall?
Wednesday, October 22, 2008.
Firesarter is a free firewall tool for Linux machines. Whether you simply want to protect your personal workstation or you have a network of computers to secure, Firestarter is here to make your life easier. While a firewall can not guarantee security, it is the first line of defense against network based attacks. Firestarter is an Open Source visual firewall program. The software aims to combine ease of use with powerful features, therefore serving both Linux desktop users and system administrators. We strongly believe that your job is to make the high level security policy decisions and ours is to take care of the underlying details. This is a departure from your typical Linux firewall, which has traditionally required arcane implementation specific knowledge.
Where can I download books from the Web?
LutelWall makes use of the netfilter code in the 2.4 Linux kernel and is more robust and configurable than an equivalent IPchains script.
Free firewall packages which you can download include:
Turtle Firewall is a software which allows you to realize a Linux firewall in a simply and fast way. It's based on Kernel 2.4.x and Iptables. Its way of working is easy to understand: you can define the different firewall elements (zones, hosts, networks) and then set the services you want to enable among the different elements or groups of elements. You can do this simply editing a XML file or using the comfortable web interface, Webmin.
Traffic features: Flexible control over traffic using rule set User-defined protocols support Support for any kind multiple external and internal interfaces (and aliases) Automated MASQUERADE / SNAT support Easy to set up DNAT (transparent proxy, redirections to LAN/DMZ etc.) Rate limit extensions Packet marking for 3rd party shapers TOS (Type of Service) traffic optimizer Both passive and active FTP support DHCP support Can work as "workstation" firewall.
Logging features: Logging stealth scans (FIN, Xmas Tree, Null), ACK scan modes (nmap -sF -sX -sN), IP protocol scans (nmap -sO), UDP scans (nmap -sU), nmap fingerprinting attempts.
Free firewalls have become very common and represent an excellent alternative to commercial firewall packages. Most of these firewalls run under some form of Linux, FreeBSD, or OpenBSD.
Many of these free firewalls are front-ends for the lower-level firewall packages which ship with these operating systems, such as pf (Packet Filter), ipf (IPFilter), ipfw (IPFirewall), and iptables.
English Online Resources - The Virtual Library of Virginia (VIVA) makes available thousands of titles, many in the public domain. Although some texts are only available to affiliates of VIVA, if you're looking for literary classics you'll find some treasures here. Most modern works that haven't entered the public domain require payment, whether in print form or downloadable as electronic texts. Numerous sites offer online shopping for electronic texts, usually offering a small collection of free public domain works too. Here are a couple:
LutelWall can be used on a dedicated firewall system, a multi-function gateway/router/server or on a standalone system. Configuration method of this firewall is designed to be as simple as possible without loosing Netfilter flexibility and its security features.
Open Source software, available free of charge User friendly, easy to use, graphical interface A wizard walks you through setting up your firewall on your first time Suitable for use on desktops, servers and gateways Real-time firewall event monitor shows intrusion attempts as they happen Enables Internet connection sharing, optionally with DHCP service for the clients Allows you to define both inbound and outbound access policy Open or stealth ports, shaping your firewall policy with just a few mouse clicks Enable port forwarding for your local network in just seconds Option to whitelist or blacklist traffic Real time firewall events view View active network connections, including any traffic routed through the firewall Advanced Linux kernel tuning features provide protection from flooding, broadcasting and spoofing Support for tuning ICMP parameters to stop Denial of Service (DoS) attacks Support for tuning QoS parameters to improve services for connected client computers Ability to hook up user defined scripts or rule sets before or after firewall activation Supports Linux Kernels 2.4 and 2.6 Translations available for many languages (38 languages as of November 2004)
For more information, see the Online Books category.
AuthorHouse - Become a registered member for free and store your downloaded books in a personal library. 1st Books sells paperback or hardback editions as well.
LutelWall is a Linux IPtables shell script written in bash for use as a stateful firewall and NAT/masquerade router for single or multiple subnets networks.
Security features: Stateful TCP connection tracking with restrictive TCP chain Blocking all stealth mode scans (FIN, Xmas Tree, Null, Windows scan or ACK scan modes (nmap -sF -sX -sN -sW -sA) Blocking IP protocol scans (nmap -sO) Blocking UDP scans (nmap -sU) Blocking identification via TCP/IP fingerprinting (nmap -O) Anti-spoof protection, including protection for aliases Anti-smurf protection TCP SYN Flood protection UDP / ICMP Flood protection IANA reserved addresses checking SYSCTL parameters set for increased strength.
dorrancEbooks -Purchase books and download them immediately to your computer. Some classics are available for free.
Other features: Autodetect of connection type (static/dynamic, external/internal) Auto update of firewall tool Auto update IANA reserved list Display firewall statistics in iptables native, csv or html format Easy deployment on all distributions.
Using script language as configuration and decision language(Python) Supported protocols: HTTP/1.1 FTP SSL finger plug whois telnet Utilizing modular application gateways Able to analyze sub-protocols (for example HTTP in SSL) Can add/remove packet filter rules on-demand You can write your own proxy modules in Python if a native version is not available.
Electronic Literature Foundation - ELF features advanced electronic texts of Western classical works "to be used by students, scholars, and admirers of literature around the world." Their library currently holds 96 works by 18 authors from Dante to Voltaire.
Zorp is a new generation proxy firewall suite and as such its core architecture is built around today's security demands: it uses application level proxies, it is modular and component based, it uses a script language to describe policy decisions, it makes it possible to monitor encrypted traffic, it let's you override client actions, it let's you protect your servers with its built in IDS capabilities. The list is endless. It gives you all the power you need to implement your local security policy.
Where can I download a free firewall?
LutelWall is high-level Linux firewall configuration tool. It uses human-readable and easy to understand configuration to set up Netfilter in the most secure way. The flexibility of LutelWall allows firewall adminstrators build very simple, single-homed firewalls, and most complex ones - with multiple subnets, DMZ's and traffic redirections.
You may not be able to get John Grisham ebooks yet, but book lovers can get their hands on both classics and new authors' works via the Internet. In addition, most downloadable books are much cheaper than printed editions. (Some are even free!) The following are a few of the larger downloadable book sites: