I am seeing journal entries such as the following, which appear at regular 4-second intervals:Jan 22 19:31:00 tara kernel: OUT-global:IN= OUT=enp3s0f2 SRC=fe80:0000:0000:0000:56e4:c37c:30cc:668f DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=158870 PROTO=ICMPv6 TYPE=133 CODE=0Jan 22 19:31:04 tara kernel: OUT-global:IN= OUT=enp3s0f2 SRC=fe80:0000:0000:0000:56e4:c37c:30cc:668f DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=158870 PROTO=ICMPv6 TYPE=133 CODE=0Jan 22 19:31:08 tara kernel: OUT-global:IN= OUT=enp3s0f2 SRC=fe80:0000:0000:0000:56e4:c37c:30cc:668f DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=158870 PROTO=ICMPv6 TYPE=133 CODE=0Jan 22 19:31:12 tara kernel: OUT-global:IN= OUT=enp3s0f2 SRC=fe80:0000:0000:0000:56e4:c37c:30cc:668f DST=ff02:0000:0000:0000:0000:0000:0000:0002 LEN=48 TC=0 HOPLIMIT=255 FLOWLBL=158870 PROTO=ICMPv6 TYPE=133 CODE=0RFC4890 - Recommendations for Filtering ICMPv6 Messages in Firewalls lists Router Solicitation (Type 133)in Section 4.4.1 - Traffic That Must Not Be Dropped.But it seems that my configuration is indeed dropping them.My iptables are generated by firehol, configured thus:version 6# ssh on port 5090 (ssh is a built-in service name)server_ssh_hidden_ports=tcp/5090client_ssh_hidden_ports=default# moshserver_mosh_ports=udp/60001:60020 # Mosh uses 60001 to 60999 counting upclient_mosh_ports=default# NoMachine (nxserver is a built-in, but seemingly on incorrect ports)server_nomachine_ports=tcp/4000client_nomachine_ports=default# Delugeserver_deluge_ports=tcp/8112client_deluge_ports=default# Zerotier-oneinterface zt0 zerotier        policy reject # be nicer than default drop on internal network        protection strong        server ssh_hidden mosh accept with limit 8/min 10 # rate/period [burst]        server nomachine deluge accept with limit 8/min 10 # rate/period [burst]        #server ssh_hidden nomachine accept with recent recent-zerotier 30 6 # name, seconds, attempts per period        client all accept# All interfaces - look at fallthrough if putting this non-last as it didn't work without itinterface any global        protection strong        server ssh_hidden accept with limit 8/min 10        client all acceptHow do I remove these noisy log messages?
Prevent dropping of IPv6 Router Solicitation (Type 133) packets
iptables;firewall;firehol
As mentioned in FireHOL IPv6 Setup, add the following to the top of your firehol.conf:ipv6 interface any v6interop proto icmpv6  client ipv6neigh accept  server ipv6neigh accept  client ipv6mld accept  client ipv6router accept  policy return