table inet le_app_codex {
  set approved_dns4 {
    type ipv4_addr
    flags interval
    elements = { 9.9.9.9, 149.112.112.112 }
  }

  set operator_host_public4 {
    type ipv4_addr
    flags interval
    elements = { 74.67.173.56 }
  }

  set denied4 {
    type ipv4_addr
    flags interval
    elements = {
      0.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 127.0.0.0/8,
      169.254.0.0/16, 172.16.0.0/12, 192.0.0.0/24,
      192.0.2.0/24, 192.88.99.0/24, 192.168.0.0/16,
      198.18.0.0/15, 198.51.100.0/24, 203.0.113.0/24,
      224.0.0.0/4, 240.0.0.0/4
    }
  }

  chain input {
    type filter hook input priority filter; policy accept;
    iifname "lecodex-host" ct state established,related accept
    iifname "lecodex-host" ip daddr @approved_dns4 udp dport 53 accept
    iifname "lecodex-host" ip daddr @approved_dns4 tcp dport 53 accept
    iifname "lecodex-host" counter drop
  }

  chain forward {
    type filter hook forward priority filter; policy accept;
    oifname "lecodex-host" ct state established,related accept
    oifname "lecodex-host" counter drop
    iifname "lecodex-host" ip daddr @approved_dns4 udp dport 53 accept
    iifname "lecodex-host" ip daddr @approved_dns4 tcp dport 53 accept
    iifname "lecodex-host" ip daddr @operator_host_public4 counter drop
    iifname "lecodex-host" ip daddr @denied4 counter drop
    iifname "lecodex-host" meta nfproto ipv6 counter drop
    iifname "lecodex-host" tcp dport { 25, 465, 587 } counter drop
    iifname "lecodex-host" tcp dport { 80, 443 } accept
    iifname "lecodex-host" counter drop
  }
}

table ip le_app_codex_nat {
  chain postrouting {
    type nat hook postrouting priority srcnat; policy accept;
    ip saddr 10.200.120.0/30 oifname != "lecodex-host" masquerade
  }
}