Paquet : ipset (7.17-1)

administration tool for kernel IP sets

IP sets are a framework inside the Linux 2.4.x and 2.6.x kernel which can be administered by the ipset(8) utility. Depending on the type, currently an IP set may store IP addresses, (TCP/UDP) port numbers or IP addresses with MAC addresses in a way which ensures lightning speed when matching an entry against a set.

If you want to

 * store multiple IP addresses or port numbers and match against the
   entire collection using a single iptables rule.
 * dynamically update iptables rules against IP addresses or ports without
   performance penalty.
 * express complex IP address and ports based rulesets with a single
   iptables rule and benefit from the speed of IP sets.

then IP sets may be the proper tool for you.

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