version: "2" networks: ipv4net: ipam: config: - subnet: 172.16.10.0/24 dualstacknet: enable_ipv6: true ipam: config: - subnet: 172.16.20.0/24 - subnet: fd00:cafe:face:feed::/64 services: ipv4only: image: web expose: - "80" environment: WEB_PORTS: 80 VIRTUAL_HOST: ipv4only.nginx-proxy.tld networks: ipv4net: ipv4_address: 172.16.10.2 dualstack: image: nginx:alpine environment: VIRTUAL_HOST: dualstack.nginx-proxy.tld networks: dualstacknet: ipv4_address: 172.16.20.2 ipv6_address: fd00:cafe:face:feed::2 sut: image: nginxproxy/nginx-proxy:test volumes: - /var/run/docker.sock:/tmp/docker.sock:ro networks: ipv4net: ipv4_address: 172.16.10.3 dualstacknet: ipv4_address: 172.16.20.3 ipv6_address: fd00:cafe:face:feed::3