IPv6 default firewall for RouterOS v6 and v7

/ipv6 firewall { address-list add list=bad_ipv6 address=::/128 comment="defconf: unspecified address" address-list add list=bad_ipv6 address=::1 comment="defconf: lo" address-list add list=bad_ipv6 address=fec0::/10 comment="defconf: site-local" address-list add list=bad_ipv6 address=::ffff:0:0/96 comment="defconf: ipv4-mapped" address-list add list=bad_ipv6 address=::/96 comment="defconf: ipv4 compat" address-list add list=bad_ipv6 address=100::/64 comment="defconf: discard only " address-list add list=bad_ipv6 address=2001:db8::/32 comment="defconf: documentation" address-list add list=bad_ipv6 address=2001:10::/28 comment="defconf: ORCHID" address-list add list=bad_ipv6 address=3ffe::/16 comment="defconf: 6bone" filter add chain=input action=accept connection-state=established,related,untracked comment="defconf: accept established,related,untracked" filter add chain=input action=drop connection-state=invalid comment="defconf: drop invalid" filter add chain=input action=accept protocol=icmpv6 comment="defconf: accept ICMPv6" filter add chain=input action=accept protocol=udp port=33434-33534 comment="defconf: accept UDP traceroute" filter add chain=input action=accept protocol=udp dst-port=546 src-address=fe80::/10 comment="defconf: accept DHCPv6-Client prefix delegation." filter add chain=input action=accept protocol=udp dst-port=500,4500 comment="defconf: accept IKE" filter add chain=input action=accept protocol=ipsec-ah comment="defconf: accept ipsec AH" filter add chain=input action=accept protocol=ipsec-esp comment="defconf: accept ipsec ESP" filter add chain=input action=accept ipsec-policy=in,ipsec comment="defconf: accept all that matches ipsec policy" filter add chain=input action=drop in-interface-list=!LAN comment="defconf: drop everything else not coming from LAN" filter add chain=forward action=accept connection-state=established,related,untracked comment="defconf: accept established,related,untracked" filter add chain=forward action=drop connection-state=invalid comment="defconf: drop invalid" filter add chain=forward action=drop src-address-list=bad_ipv6 comment="defconf: drop packets with bad src ipv6" filter add chain=forward action=drop dst-address-list=bad_ipv6 comment="defconf: drop packets with bad dst ipv6" filter add chain=forward action=drop protocol=icmpv6 hop-limit=equal:1 comment="defconf: rfc4890 drop hop-limit=1" filter add chain=forward action=accept protocol=icmpv6 comment="defconf: accept ICMPv6" filter add chain=forward action=accept protocol=139 comment="defconf: accept HIP" filter add chain=forward action=accept protocol=udp dst-port=500,4500 comment="defconf: accept IKE" filter add chain=forward action=accept protocol=ipsec-ah comment="defconf: accept ipsec AH" filter add chain=forward action=accept protocol=ipsec-esp comment="defconf: accept ipsec ESP" filter add chain=forward action=accept ipsec-policy=in,ipsec comment="defconf: accept all that matches ipsec policy" filter add chain=forward action=drop in-interface-list=!LAN comment="defconf: drop everything else not coming from LAN" }