https://forum.mikrotik.com/viewtopic.php?t=88479
https://wiki.mikrotik.com/wiki/Manual:IP/Firewall/Connection_tracking
https://wiki.mikrotik.com/wiki/Manual:Scripting#Other_Operators
https://www.pcwdld.com/nat-lookup-tools-and-software
/ip firewall connection print where src-address ~"x.x.x."
Flags:
https://yaleman.org/2014/10/23/hairpin-nat-on-mikrotik-v6-19/
Hairpin NAT allows internal clients behind NAT to access port-forwarded (destination NATed) services (behind the same NAT) as if they were accessed from the outside.