firewall/nat.nft

#! /sbin/nft -f

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.

# Copyright © 2018-2019 Hugo Levy-Falk <hugo@klafyvel.me>

table ip nat {

	set radius_federez {
		type ipv4_addr
		elements = { 195.154.165.76, 185.230.78.47 }
	}

	chain prerouting {
		type nat hook prerouting priority 0;
		ip saddr $range_prerezotage ip daddr != { $intranet, $comnpay, $website } tcp dport {http,https} dnat $bounce_server;
		ip saddr @radius_federez ip daddr $ip_self_public tcp dport { 636, 389 } dnat $ip_radius;
		ip saddr @radius_federez ip daddr $ip_self_public udp dport { 636, 1812 } dnat $ip_radius;
	}


	chain postrouting {
		type nat hook postrouting priority 100

		meta oifname != $if_supelec return

		ip saddr $ip_radius ip daddr @radius_federez tcp dport { 636, 389} snat to $ip_self_public
		ip saddr $ip_radius ip daddr @radius_federez udp dport { 636, 1812 } snat to $ip_self_public

		ip daddr != {10.0.0.0/8, $range_public} ip saddr vmap {
			$range_adherent : goto adherent_nat,
			$range_admin : goto admin_nat,
			$range_federez : goto federez_nat,
			$range_aloes : goto aloes_nat,
			$range_prerezotage : goto prerezotage_nat
		}

		ip daddr != {10.0.0.0/8, $range_public} ip saddr != $range_public snat to $ip_self_public
	}

}