Your iptable is ready: using a Linux firewall
In the Wild West atmosphere of the Internet, firewalls are a popular topic. That's a good thing: Whether you're responsible for hundreds of corporate servers or a single home workstation, anyone who manages a computer needs to know how firewalls work and how to deploy them properly.
A firewall controls access to a local network, locking out intruders while keeping your systems--and your data--safe on the inside.
By Ross Greenberg at Security Pipeline.
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