Can't Access my Site through Browser

Hi all. I am using 1GB droplet for my two sites. I can log in through ssh terminal and can access my site1 through the terminal and through the browser. But I am unable to access my site2 through the browser. If I change my IP I can access the site through the browser. My server configuration is as under,
* Ubuntu 16
* Apache
* Varnish
Ubuntu firewall is running. I disabled it but still, I can't access my site2 through the browser. IMO, the firewall is not creating the problem because I can access my site1 via same IP. No firewall or antivirus plugin is installed.

Please help what could be the issue.