ipset create blacklist hash:net
iptables -A INPUT -m set --match-set blacklist src -j DROP
===== AƱadir elementos =====
ipset add blacklist n.n.n.n
===== Listar elementos =====
ipset list blacklist
===== Eliminar elemento =====
ipset del blacklist n.n.n.n
===== Vaciar lista =====
ipset flush blacklist
===== Destruir =====
iptables -D INPUT -m set --match-set blacklist
ipset destroy blacklist