nfsense/pkg/nftables/template/nftables.tmpl

#!/usr/sbin/nft -f

flush ruleset

# Address object ipsets
{{template "addresses.tmpl" .}}

# nfsense nftables inet (ipv4 + ipv6) table
table inet nfsense_inet {

    # Inbound Rules
    chain inbound {
        type filter hook input priority 0; policy drop;

        # Allow traffic from established and related packets, drop invalid
        ct state vmap { established : accept, related : accept, invalid : drop }

        # allow loopback traffic, anything else jump to chain for further evaluation
        iifname vmap { lo : accept, $DEV_WORLD : jump inbound_world, $DEV_PRIVATE : jump inbound_private }

        {{template "inbound_rules.tmpl" .}}
    }

    # Forward Rules
    chain forward {
        type filter hook forward priority 0; policy drop;

        # Allow traffic from established and related packets, drop invalid
        ct state vmap { established : accept, related : accept, invalid : drop }

        {{template "forward_rules.tmpl" .}}
    }

    # Destination NAT Rules
    chain prerouting {
        type nat hook prerouting priority -100; policy accept;

        {{template "destination_nat_rules.tmpl" .}}
    }

    # Source NAT Rules
    chain postrouting {
        type nat hook postrouting priority 100; policy accept;

        {{template "source_nat_rules.tmpl" .}}
    }
}