IPv6-only Network based on Jool
Here is the classical topology of home network. All the hosts can access the Internet through one router. The router has dual stack of v4/v6. And all the LAN hosts have one /64 IPv6 prefix.
There are two problems we need to fix. Firstly, let the LAN hosts access the IPv4 Internet without mutual interference. Secondly, support IPv4-to-IPv6 port mapping so that the IPv4-only host in the Internet can reach the services hosted on the IPv6-only LAN hosts.
Besides the Jool, you may find the TAYGA2. TAYGA is an out-of-kernel stateless NAT64 implementation for Linux that uses the TUN driver to exchange IPv4 and IPv6 packets with the kernel.
TAYGA is not the proper choice because it only support the stateless NAT64, which means you need several public IPv4 addresses to to the IPv4-to-IPv6 mapping. Another drawback of TAYGA is that it uses the TUN devices, which may have performance issue.
On the contrary, the Jool is another Open Source Ipv4/IPv6 Translator with active development. Jool support both stateless and stateful NAT64.
