--- /lib/systemd/system/nginx.service.orig      2017-02-21 03:09:28.381030411 +0000
+++ /lib/systemd/system/nginx.service   2017-02-21 02:58:43.634568981 +0000
@@ -12,7 +12,7 @@
 #
 [Unit]
 Description=A high performance web server and a reverse proxy server
-After=network.target
+Requires=network-online.target nss-lookup.target

 [Service]
 Type=forking