![]() This is the default table (if no -t option is passed). Made to load the appropriate module for that table if it is not already there. If the kernel is configured with automatic module loading, an attempt will be This option specifies the packet matching table which the command should operate On the kernel configuration options and which modules are present). There are currently five independent tables (which tables are present at any time depends With target RETURN is matched, the target specified by the chain policy determines the If the end of a built-in chain is reached or a rule in a built-in chain RETURN means stop traversing this chain and resume at the next rule in the previous DROP means to drop the packet on the floor. Of the targets described in iptables-extensions(8), or one of the special values ACCEPT,ĪCCEPT means to let the packet through. Specified by the value of the target, which can be the name of a user-defined chain, one Match, the next rule in the chain is examined if it does match, then the next rule is ![]() This is called a `target', which may be a jump to aĪ firewall rule specifies criteria for a packet and a target. Several different tables may be defined.Įach table contains a number of built-in chains and may also contain user-defined chains.Įach chain is a list of rules which can match a set of packets. IPv6 packet filter rules in the Linux kernel. ![]() Target = -j targetname ĭESCRIPTION Iptables and ip6tables are used to set up, maintain, and inspect the tables of IPv4 and Iptables -P chain target iptables -E old-chain-name new-chain-name Iptables/ip6tables - administration tool for IPv4/IPv6 packet filtering and NAT Provided by: iptables_1.8.4-3ubuntu2_amd64
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