I.P. no response after apache

[root@www ~]# service httpd status
Redirecting to /bin/systemctl status httpd.service
● httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2018-07-06 18:13:10 +08; 27min ago
Docs: man:httpd(8)
man:apachectl(8)
Process: 3915 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=0/SUCCESS)
Main PID: 3920 (httpd)
Status: "Total requests: 0; Current requests/sec: 0; Current traffic: 0 B/sec"
CGroup: /system.slice/httpd.service
├─3920 /usr/sbin/httpd -DFOREGROUND
├─3921 /usr/sbin/httpd -DFOREGROUND
├─3922 /usr/sbin/httpd -DFOREGROUND
├─3923 /usr/sbin/httpd -DFOREGROUND
├─3924 /usr/sbin/httpd -DFOREGROUND
└─3925 /usr/sbin/httpd -DFOREGROUND

What is the IP? Do you have a firewall enabled?

I think firewalld was recently enabled on the centos image. you should disable it or add a firewall rule:

https://www.linode.com/docs/web-servers/lamp/lamp-on-centos-7/#configure-firewalld-to-allow-http-connections