By configuring your Raspberry Pi 5 to adopt both an IPv4 and IPv6, Core Bitcoin will use an IPv6 addressing whenever it is available. Certainly, TOR can be the best way to solve the issue of inbound connections in order not to freak out the central server. The TOR bridges in place ensure complete anonymity provided in TOR. Responding to any possible problem of CGNAT or unstable IPv4 to make your full node approachable and anonymous.