Feather Linux for firewalls
The firewall infrastructure of GNU/Linux consists of two parts, the kernel (netfilter) and the configuration structure (iptables). In order to build a firewall structure in GNU/Linux, you first need the proper netfilter support, which almost every Linux distribution includes by default. The second part is the set of rules that govern the packets (traffic) to be let in and the packets to deny.
These rule sets are called chains. To set your rules, you must set up a chain of them to manipulate packets appropriately.
By KIVILCIM Hindistan at O'Reilly.
[ Read more ]
By subscribing to our early morning news update, you will receive a daily digest of the latest security news published on Help Net Security.
With over 500 issues so far, reading our newsletter every Monday morning will keep you up-to-date with security risks out there.