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Network security is an important aspect of todays enterprise information technology. A good security policy consists out of user education, access control lists, operating system, applications and last but not least a stable and reliable firewall. Even though a firewall is far from the key factor of network security it should never be underestimated.
Linux is known to be a secure operating system which is the key factor of a secure firewall. That's why agencies such as the US National Security Agency (NSA) are using Linux to protect their confidential data. Not only is Linux a secure operating system, it is an ideal platform for security applications, such as a firewall. Linux offers a native firewall called Netfilter, below is an overview of its main features:
 | Kernel Space Packet Filtering |
 | Stateful Packet Inspection |
 | MAC Address Filtering |
 | Enhanced Network Address Translation (NAT) |
 | Rate-Limited Matching |
 | Type of Service (TOS) Prioritization |
To facilitate user friendly administration Linugen has developed a web based Policy Manager. This allows administrators to take control of the firewall rulebase through a standard browser. Needless to say the web based Policy Manager is secured using SSL certificates. In addition Linugen also offers various Intrusion Detection Systems.
Read what others have to say about Linux Firewalling:
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