Linux Firewalls Using iptables


A firewall is a critical part of any establishment that connects to an unprotected network such as the Internet, but a firewall is never sufficient. Web site security involves not just protection from corrupted packets or maliciously overwhelming volumes of traffic, but also involves daily data backups to help recovery from device failures, regular application patching, enforced password policies, restricted and monitored physical access to your servers, reliable power and cooling, secured cabling, redundant hardware, and, probably most importantly, well trained and motivated employees. Security should be viewed as anything that contributes to the desired risk-free functioning of your site, and it is well worth the money to invest in and learn from a book that specializes in the topic.

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