Modulo recent

  1. http://falkhusemann.de/blog/2012/07/iptables-dns-query-limiting-with-burst-rate/
  2. https://www.vivaolinux.com.br/artigo/Criando-firewalls-dinamicos-com-Iptables-Recent
  3. https://www.rayheffer.com/essential-linux-skills-with-centos-7-secure-firewall-with-iptables/
  4. https://www.netfilter.org/documentation/HOWTO/netfilter-extensions-HOWTO-3.html
  5. https://we.riseup.net/stefani/iptables-recent-module-and-hit-limits