Liberar ping

Para máquina de firewall

iptables -A INPUT -p icmp --icmp-type 0 -m limit --limit 1/sec -j ACCEPT

iptables -A OUTPUT -p icmp --icmp-type 8 -m limit --limit 1/sec -j ACCEPT

Para rede

iptables -A FORWARD -p icmp --icmp-type 8 -m limit --limit 1/sec -j ACCEPT

iptables -A FORWARD -p icmp --icmp-type 0 -m limit --limit 1/sec -j ACCEPT
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