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docs: IPv6 support for docker networks

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Nicolas Duchon 2024-12-01 22:41:09 +01:00
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docs/README.md
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@ -618,7 +618,19 @@ If the default certificate is also missing, nginx-proxy will:
## IPv6 Support
You can activate the IPv6 support for the nginx-proxy container by passing the value `true` to the `ENABLE_IPV6` environment variable:
### IPv6 Docker Networks
nginx-proxy support both IPv4 and IPv6 on Docker networks.
By default nginx-proxy will prefer IPv4: if a container can be reached over both IPv4 and IPv6, only its IPv4 will be used.
This can be changed globally by setting the environment variable `PREFER_IPV6_NETWORK` to `true` on the proxy container: with this setting the proxy will only use IPv6 for containers that can be reached over both IPv4 and IPv6.
IPv4 and IPv6 are never both used at the same time on containers that use both IP stacks to avoid artificially inflating the effective round robin weight of those containers.
### Listening on IPv6
By default the nginx-proxy container will only listen on IPv4. To enable listening on IPv6 too, set the `ENABLE_IPV6` environment variable to `true`:
```console
docker run -d -p 80:80 -e ENABLE_IPV6=true -v /var/run/docker.sock:/tmp/docker.sock:ro nginxproxy/nginx-proxy