We are Giving  linux  and  Branded cost effective firewall solution to the corporate and channels
There are several types of firewall techniques:

1. Packet filter: Looks at each packet entering or leaving the network and accepts or rejects it based on user-defined rules. Packet filtering is fairly effective and transparent to users, but it is difficult to configure. In addition, it is susceptible to IP Spoofing.
2. Application gateway: Applies Security mechanisms to specific applications, such as FTP and Telnet servers. This is very effective, but can impose a performance degradation.
3. Circuit-level gateway: Applies security mechanisms when a TCP or UDP connection is established. Once the connection has been made, packets can flow between the hosts without further checking.
4. Proxy server: Intercepts all messages entering and leaving the network. The Proxy server  effectively hides the true network addresses.
   In practice, many firewalls use two or more of these techniques in concert.
   A firewall is considered a first line of defense in protecting private information. For greater security, data can be encrypted.
   We are providing Branded like sonicwall,Fortigate,and linux firewall solution to the customers. Major advantages of the Firewall products are - Firewall / VPN Appliances, Anti-spyware, Anti-virus, Anti-spam, Intrusion Prevention, URL filtering, Storage, Network Supervision,
   The Linux  Firewall is an open source linux firewall  that specializes on Routing/Firewalling and Unified Threat Management, It is now based on Linux from Scratch.

It contains following packages:

• Firewall 
• Virtual Private Network (VPN) Gateway with OpenVPN or IPsec
• Web Antivirus
• Web Antispam
• E-Mail Antivirus
• E-Mail Antispam
• Transparent HTTP-Proxy
• Content Filter
• SIP VoIP Support
• Network Address Translation
• Multi IP address (aliases)
• HTTPS web interface
• Connection statistics
• Log of networking traffic
• Forwarding of logs to an external server
• DHCP-Server
• NTP-Server
• Intrusion Detection System
• ADSL-Modem Support
• Updates via a single command
• Description
• Linux firewalls provide capabilities that rival commercial firewalls, and are built upon the powerful Netfilter infrastructure in the Linux kernel. Linux Firewalls: Attack Detection and Response explores using Netfilter as an intrusion detection system (IDS) by combining it with Snort rulesets and custom open source software created by the author. Providing concrete examples to illustrate concepts, the book discusses Linux firewall log analysis and policies, passive network authentication and authorization, exploit packet traces and Snort ruleset emulation, and more. Perl and C code snippets are included to help readers maximize the deployment of Linux firewalls as effective mechanisms for the detection and prevention of various network-based attacks.
• System administrators need to stay ahead of new security vulnerabilities that leave their networks exposed every day. A firewall and an intrusion detection systems (IDS) are two important weapons in that fight, enabling you to proactively deny access and monitor network traffic for signs of an attack.
• Linux Firewalls discusses the technical details of the iptables firewall and the Netfilter framework that are built into the Linux kernel, and it explains how they provide strong filtering, Network Address Translation (NAT), state tracking, and application layer inspection capabilities that rival many commercial tools. You'll learn how to deploy iptables as an IDS with psad and fwsnort and how to build a strong, passive authentication layer around iptables .
• Concrete examples illustrate concepts such as firewall log analysis and policies, passive network authentication and authorization, exploit packet traces, Snort ruleset emulation, and more with coverage of these topics:
• Passive network authentication and OS fingerprinting
• Iptables log analysis and policies
• Application layer attack detection with the iptables string match extension
• Building an iptables ruleset that emulates a Snort ruleset
• Port knocking vs. Single Packet Authorization (SPA)
• Tools for visualizing iptables logs
• Perl and C code snippets offer practical examples that will help you to maximize your deployment of Linux firewalls. If you're responsible for keeping a network secure, you'll find Linux Firewalls invaluable in your attempt to understand attacks and use iptables-along with psad and fwsnort-to detect and even prevent compromises.
• It can be concluded that a firewall is a "must have" security product, without which, our computers can be exposed to intentional hostile intrusion.
• We are providing the firewall with support. Based on the customers requirement We will do the Customization.