The first question would be where you apply the access-list - inbound or outbound. Because then respectively source and destination have to be swapped. The following statements should be helpful for an inbound access-list from the rest of the world to 172.18.100.0/22:
access-list 101 deny tcp any any eq domain log-input
access-list 101 deny tcp any eq domain any log-input
access-list 101 permit udp any eq domain 172.18.100.0 0.0.3.255
3. somewhat unclear what "Loopback" means, I assume 127/8
access-list 101 deny ip 127.0.0.0 0.255.255.255 any
access-list 101 deny ip 184.108.40.206 220.127.116.11 any
access-list 101 deny ip any 18.104.22.168 22.214.171.124
5. what is meant by "broadcast"? a router will stop broadcast anyhow.
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We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...