firmware/src/packages/fff/fff-node/files/usr/lib/firewall.d/30-client-dhcpv6

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# Erlaube DHCPv6 Requests
ebtables -A MULTICAST_OUT -p IPv6 --ip6-proto udp --ip6-dport 547 -j RETURN
# Erlaube nur DHCPv6 Request von CLIENT -> BATMAN
ebtables -A FORWARD -p IPv6 --ip6-proto udp --ip6-dport 547 -j OUT_ONLY
# Erlaube nur DHCPv6 Antworten von BATMAN -> CLIENT
ebtables -A FORWARD -p IPv6 --ip6-proto udp --ip6-dport 546 -j IN_ONLY