how to fix the website down

Dear Cristian, how can i fix this problem and make the website up again?

Dear Jenny, could you please provide a little more details such as:

• is the website hosted on an EC2 Instance?
• is the public ip of the instance the ip assigned to the website where the service is running?
• if yes, do you have security groups allowing traffic destined to the public IP of the Instance?
• do you have any load balancer in front of the EC2 instance?
• could you please share a diagram/image of the architecture so that I can be more helpful?
• do you have a firewall in front of the instance?
• where are you connecting from?

if you could provide as much details as possible, I can try to help, thanks!

Dear Cristian, thanks for your help:

1. the website is hosted on an EC2 instance
2. yes
3. yes, i have the security groups
4. no load balancer and firewall I show you pictures

i don't know how to send you pictures here, do you have other contact information like whatsapp?

Jenny, thanks for your answers, so I assume you have a pretty normal setup, please check the following and come back to me:

1. check if the Security Group is configured to allow traffic to the specific EC2, on the specific public IP of the instance, check if this Security Groups is actually assigned to the correct instance, just to make sure, it should but just check.
2. check if the security group is allowing http 80 or https 443 depending on the protocol you are using on the website
3. check if the website is running, if you are using linux based, check if httpd process is running, you can check if the server is running by using

service httpd start service httpd status

4. check if you have a firewall on the instance running on it which is preventing the connection to be established, based on the screenshot, it looks like it