Set ipv6only=off

start.sh

@@ -35,7 +35,7 @@ http {
 	}
 
 	server {
-		listen [::]:${PROXY_PORT:-8443} http2 ssl;
+		listen [::]:${PROXY_PORT:-8443} http2 ssl default_server ipv6only=off;
 		server_name *.${PROXY_DOMAIN} ${PROXY_DOMAIN};
 		ssl_certificate ${config_dir}/ssl.crt;
 		ssl_certificate_key ${config_dir}/ssl.key;