# CIS Ubuntu 24.04 - durcissement sysctl reseau (3.3.x)
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv6.conf.all.accept_redirects = 0
net.ipv6.conf.default.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv6.conf.all.accept_source_route = 0
net.ipv6.conf.default.accept_source_route = 0
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.default.log_martians = 1
net.ipv4.tcp_syncookies = 1
net.ipv6.conf.all.accept_ra = 0
net.ipv6.conf.default.accept_ra = 0
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
{% if ip_forwarding_disabled | default(false) %}
# ip_forward desactive : ce host ne fait tourner ni Docker (NAT de ports publies) ni de relais VPN.
net.ipv4.ip_forward = 0
net.ipv6.conf.all.forwarding = 0
{% else %}
# ip_forward laisse actif (defaut systeme = 1) : ce host heberge Docker et/ou fait relais VPN,
# le desactiver casserait le NAT des ports publies ou le routage entre pairs WireGuard.
# CIS 35608 restera donc en echec ici par necessite fonctionnelle, pas par oubli.
{% endif %}