Internet --- eth0-Gateway server -eth1 --- Une sorte de serveur
# firewall-cmd --get-active-zone
public
  interfaces: eth0 eth1
# nmcli connection modify eth1 connection.zone internal
# nmcli connection modify eth0 connection.zone external
# firewall-cmd --get-active-zone
external
  interfaces: eth0
internal
  interfaces: eth1
#  cat /proc/sys/net/ipv4/ip_forward
1
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