We have SharePoint App, WFE and DB Servers. I have run SP Configuration wizard after that AppServer and DBServer return page cannot be displayed if I open the Site. But site is working fine if open in WFE server. How to fix this issue?
Did you set AAM in your SharePoint 2013?
If you run SharePoint Configuration wizard, it will re-configure some settings.
To troubleshoot the issue, check things below:
Reboot the servers.
Check if the servers can communicate with each other.
Check if you have configured the firewall in servers.