#!/usr/sbin/nft -f
flush ruleset

table inet filter {
  chain input {
    type filter hook input priority 0; policy drop;

    iif lo accept
    ct state established,related accept
    ct state invalid drop

    icmp type echo-request limit rate 5/second accept
    ip6 nexthdr icmpv6 icmpv6 type echo-request limit rate 5/second accept

    tcp dport 22 ip saddr {{ ssh_admin_access_cidr }} accept

{% if enable_nginx_proxy %}
    tcp dport 443 accept
{% else %}
    tcp dport {{ jumphost_app_port }} accept
{% endif %}
  }

  chain forward {
    type filter hook forward priority 0; policy drop;
  }

  chain output {
    type filter hook output priority 0; policy drop;

    oif lo accept
    ct state established,related accept

    udp dport 53 accept
    tcp dport 53 accept
    udp dport 123 accept

{% for net in target_networks %}
    ip daddr {{ net }} accept
{% endfor %}

    # ACME/interne PKI (tls_certificates-Rolle) und OS-Paketquellen
    tcp dport 443 accept
    tcp dport 80 accept
  }
}