IPv6 Support

Remarkably, this setup allows hosting Bitcart in IPv6-only environment! You can proxy Bitcart using Cloudflare, just add DNS AAAA record and enable proxy ("orange cloud"). This being will enable serving IPv4-only customers even without having dedicated IPv4 address.

To enable IPv6 support in Bitcart for Docker deployment, changes to Docker daemon must be applied. In the file /etc/docker/daemon.json, the following parameters must be added:

• "ipv6": true

• "fixed-cidr-v6": "2001:db8:1::/64"

• "default-address-pools":

"default-address-pools": [
  {"base":"172.17.0.0/16","size":16},
  {"base":"172.18.0.0/16","size":16},
  {"base":"172.19.0.0/16","size":16},
  {"base":"172.20.0.0/14","size":16},
  {"base":"172.24.0.0/14","size":16},
  {"base":"172.28.0.0/14","size":16},
  {"base":"192.168.0.0/16","size":20},
  {"base":"2001:db8::/56","size":64}
]

Please note that 2001:db8:1::/64 and 2001:db8::/56 must be changed to the IPv6 prefix provisioned by your hosting provider. Final file should look a similar way:

{
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64",
  "default-address-pools": [
    {"base":"172.17.0.0/16","size":16},
    {"base":"172.18.0.0/16","size":16},
    {"base":"172.19.0.0/16","size":16},
    {"base":"172.20.0.0/14","size":16},
    {"base":"172.24.0.0/14","size":16},
    {"base":"172.28.0.0/14","size":16},
    {"base":"192.168.0.0/16","size":20},
    {"base":"2001:db8::/56","size":64}
  ],
  "log-driver": "json-file",
  "log-opts": {"max-size": "5m", "max-file": "3"}
}

After saving /etc/docker/daemon.json configuration file, ensure to apply the new settings:

sudo systemctl restart docker

The last step is to enable IPv6 support in Bitcart:

cd
cd bitcart-docker
export BITCART_ADDITIONAL_COMPONENTS=opt-add-ipv6
./setup.sh

If you have some other additional components enabled, ensure to list all of them using comma, for example this will enable both tor and IPv6:

export BITCART_ADDITIONAL_COMPONENTS=tor,opt-add-ipv6

To see if you have any additional components enabled:

echo ${BITCART_ADDITIONAL_COMPONENTS}

Now, you are ready to add DNS AAAA record to your domain registrar or at Cloudflare dashboard.