Just weirded me out that Client A has an IPv4 and IPV6 and so does Client B. In client A i can see two IPs one v4 and v6 and both belong to client B and the same at client B I can see clients A v4 and v6 IPs. Why using both v4 and v6?

I have two clients on the same wifi network and they connect to each other via IPv4 and IPv6 how the hell is that possible?

Clients connect to SeedDNS and connect to nodes but how do nodes connect to each other?

Im running a node and im also generating with it. I accumulated 200 Coins and I would like to send them to another wallet using CLI.
Im getting the message: Fee estimation failed. Fallbackfee is disabled. Wait a few blocks or enable -fallbackfee.

How do I enable it? Thx

Im running bitcoin on a Mac. How can I use a custom .conf file? On linux I cause parameters like -conf right?
I pasted the .conf file into Application Support/bitcoin but I need to let the app somehow know that I want to apply the .conf file to it.

Any advice?

Im fooling around with my own Bitcoin fork.

I generated my own genesis block and modified chainparams.cpp.
I inserted my own Merkle hash into genesis.hashMerkleRoot and compiled it.
After compilation its reverting to the standard Merkle hash and I don't understand why.

Anyone having an idea why?