Issue nginx: configuration file /etc/nginx/nginx.conf test failed

[Azurel]

My hoster have restart the server because maintenance work on his servers host system and again nginx not start after server restart. So domains are not working. After hours waiting, I take a look with

# service nginx status

Starting Startup script for nginx service...
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: [emerg] bind() to <IPv6>:443 failed (99: Cannot assign requested address)
nginx: configuration file /etc/nginx/nginx.conf test failed
nginx.service: control process exited, code=exited status=1
Failed to start Startup script for nginx service.
Unit nginx.service entered failed state.
nginx.service failed.

BUT, with
# service nginx start
its working instantly fine. What is here the problem?

I found this article Nginx does not start automatically after reboot: 99: Cannot assign requested address

My hoster had changed the file /etc/sysconfig/network-scripts/ifcfg-enp0s5

DEVICE="enp0s5"
ONBOOT="yes"
BOOTPROTO="none"
HWADDR="00:1c:XX:XX:XX:XX"
IPADDR="37.XX.XX.XX"
NETMASK="255.255.255.255"
DHCPV6C="no"
IPV6_AUTOCONF="no"
IPV6INIT="yes"
IPV6ADDR="2A01:XX..XX:0:1/128"
GATEWAY="169.XX.XX.1"
IPV6_DEFAULTGW="FEXX::FFFF:1:1"

Its really okay to use apostrophe "value" for the values? And its allowed to use uppercase for IPV6ADDR value?

 

[IgorG]

Yes, this is all permissible. Where such doubts?
Compare syntax with content of any other files from /etc/sysconfig/network-scripts/

 

[Azurel]

I nerver see and find in network-scripts-files values with apostrophe. That's why I asked.
So I add sleep like the article suggested. I hope this helps.