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

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# Erlaube nur Router-Solicitation von CLIENT -> BATMAN
ebtables -A FORWARD -p IPv6 --ip6-proto ipv6-icmp --ip6-icmp-type router-solicitation -j OUT_ONLY
# Erlaube nur Router-Advertisment von BATMAN -> CLIENT
ebtables -A FORWARD -p IPv6 --ip6-proto ipv6-icmp --ip6-icmp-type router-advertisement -j IN_ONLY