Website not reachable

Hi,

I created and launched a t2.micro with centOS7 and tried to host a forum. I have installed httpd, with nmap port 80 open. I also set AWS security group like HTTP TCP 80/443 0.0.0.0/0.

After reaching some post all day, I tried to set Firewalld to
public (active)
target: default
icmp-block-inversion: no
interfaces: eth0
sources: 3.136.56.96
services: dhcpv6-client http ssh
ports: 80/tcp
protocols:
masquerade: no
forward-ports:
source-ports:
icmp-blocks:
rich rules:

SSH to ec2-IP.us-east-2.compute.amazonaws.com is ok. But I just could not browser it via browser. The portal show that there are inbound packages. Please kindly let me know what I should do.

My instance id is i-03e985c9f65b98bd0.