config for support of v4 web clients, requires dns server which gives only v6 protocol, otherwise this config turns into a regular reverse proxy which is also a valid way of use. dnsdist config which gives A record of this proxy to clients when in the higher one there is only AAAA you can find [here]()(not ready yet)

nginx proxy from v4 clients to v6 servers

server {
    listen 10.0.0.2:80;
#    server_name *.asv.l asv.l;  #if you only need to allow certain server names
    server_name _;

    location / {
        #if you have a dns server that only gives v6 responses, which should be proxied, specify it here
        resolver [2001:0db8::d4e6] valid=300s;
        set $upstream_host $host;
        add_header X-Server-ID "v6proxy";

        proxy_pass http://$upstream_host;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        proxy_connect_timeout 10s;
        proxy_read_timeout 30s;
        proxy_send_timeout 30s;
    }
}