iptables and netfilter are building blocks of a framework inside the Linux 2.4.x and 2.6.x kernel.
netfilter, iptables and the connection tracking as well as the NAT subsystem together build the whole framework.
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Here are some key features of "iptables":
· stateless packet filtering (IPv4 and IPv6)
· stateful packet filtering (IPv4)
· all kinds of network address and port translation (NAT/NAPT)
· flexible and extensible infrastructure
· multiple layers of API's for 3rd party extensions
· large number of plugins/modules kept in 'patch-o-matic' repository
What's New in This Release: [ read full changelog ]
· This version includes aliasing support, which translates command lines using obsolete extensions into new ones.
· The option parser now flags illegal negative numbers in some more extensions.
· A division by zero was resolved in libxt_limit as well.
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