firewall/zones/adherent.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 inet firewall {

	chain to_adherent {
		accept
	}

	chain from_adherent {
	}

}

table ip nat {
	# On nate les users derrière les IPs 193.48.225.11 à 193.48.225.140 en
	# attribuant les plages de ports 11135-65535 par tranche de 1700 ports.
	# On a donc 32 Ips de 10.69.0.0/20 derrière chaque Ip.
	# exemple: 10.69.0.1-10.69.0.31 : 193.48.225.11
	# On peut aussi ajouter dynamiquement des éléments :
	# nft add element nat adherent_nat_address {10.69.0.1-10.69.0.31 : 193.48.225.11}
	map adherent_nat_address {
		type ipv4_addr: ipv4_addr
		flags interval
	}
	chain adherent_nat {
		# Le script crée 32 sets et y répartit les adresses privées, puis
		# crée 2*32 lignes correspondantes de la forme de celles qui suivent
		# en matchant sur les sets précédents...
		# ip saddr @adherent_nat_grp1 ip protocol tcp snat ip saddr map @adherent_nat_address : 11135-12834
		# ip saddr @adherent_nat_grp1 ip protocol udp snat ip saddr map @adherent_nat_address : 11135-12834
	}
}