siotp/sisr1/tp06-firewall/fw_part2.nft

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define netif = enp0s3
define lanif = enp0s8
define dmzif = enp0s9
table ip ipfilter {
chain prerouting {
type filter hook prerouting priority filter; policy drop;
tcp dport 22 accept
}
chain system_in {
type filter hook input priority filter; policy drop;
tcp dport 22 accept
}
chain routing {
type filter hook forward priority filter; policy drop;
}
chain system_out {
type filter hook output priority filter; policy drop;
tcp sport 22 accept
}
chain postrouting {
type filter hook postrouting priority filter; policy drop;
tcp sport 22 accept
}
}