Linux: 25 Iptables Netfilter Firewall Examples For New SysAdmins

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Linux comes with a host based firewall called Netfilter. The netfilter is a set of hooks inside the Linux kernel that allows kernel modules to register callback functions with the network stack. A registered callback function is then called back for every packet that traverses the respective hook within the network stack. This Linux based firewall is controlled by the program called iptables to handles filtering for IPv4, and ip6tables handles filtering for IPv6.

https://www.cyberciti.biz/tips/linux-iptables-examples.html

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Steven Ulm 8 months ago

These Netfilter Firewall Examples are clear and easy to do. Excellent presentation for the SysAdmins! (both new and experienced even!)

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