SharePoint 2013 support app development pattern.An app for SharePoint is small and isolate application that provides a specific bit of functionality.In order to provide isolate apps run in their own domain,instead of the same domain name as your farm.Using a different domain name for apps helps prevent cross-site scripting between apps and SharePoint sites.

Because apps run in their own app domain,so you will have to configure DNS in your environment in order to be able to host apps.So I will create a completely new domain for my apps.Creating a new domain specifically to host host apps in     is a bit secure,but it also requires a little bit more configuration.OK,let's begin.

Step 1 Create a new domain to host your apps in

• Go to 192.168.123.19 Server
• Select DNS Manager
• Right Click "Forward Lookup Zone" and Select "New Zone"
• Pop-up the "New Zone Wizard" and Click "Next" again
• Specify a zone name

• Click "Next" again,then "Finish" it.
• Right click on your new zone and Select "New Alias(CName…)"
• Pop-up the properties dialog and fill in a * for alias name
• Click "Browse"
• Navigate to the Foward Lookup Zone for the domain that hosts the sharepoint sites and then navigate to the record that points to the server that hosts the sharepoint site

Step 2.Configure an isolated app domain

Use PowerShell to Create an app management and subscription setting service application

Add-PSSnapin Microsoft.SharePoint.PowerShell

Set-SPAppDomain "gcp-app.com"
Get-SPServiceInstance | where{$_.GetType().Name -eq "AppManagementServiceInstance" -or $_.GetType().Name -eq "SPSubscriptionSettingsServiceInstance"} | Start-SPServiceInstance
Get-SPServiceInstance | where{$_.GetType().Name -eq "AppManagementServiceInstance" -or $_.GetType().Name -eq "SPSubscriptionSettingsServiceInstance"}
$account = New-SPManagedAccount

$account = Get-SPManagedAccount "gcp-clinplus\SPAppAccount" 
$appPoolSubSvc = New-SPServiceApplicationPool -Name SettingsServiceAppPool_New_R -Account $account
$appPoolAppSvc = New-SPServiceApplicationPool -Name AppServiceAppPool_New_R -Account $account


$appSubSvc = New-SPSubscriptionSettingsServiceApplication –ApplicationPool $appPoolSubSvc –Name SettingsServiceApp_New_R –DatabaseName SettingsServiceDB_New_R
$proxySubSvc = New-SPSubscriptionSettingsServiceApplicationProxy –ServiceApplication $appSubSvc

$appAppSvc = New-SPAppManagementServiceApplication -ApplicationPool $appPoolAppSvc -Name AppServiceApp_New_R -DatabaseName AppServiceDB_New_R
$proxyAppSvc = New-SPAppManagementServiceApplicationProxy -ServiceApplication $appAppSvc

Set-SPAppSiteSubscriptionName -Name "fapp" -Confirm:$false

Step 3 Add isolate app domain to bypass list in Internet Explorer(* not required)

After create isolate app domain,perform the steps in the following procedure to add that domain to bypass list in IE. To Ensure that you can navigate to this domain after you depoy a sharepoint-hosted app.

• In Internet Explorer,go to Tool
• Choose Internet option
• On the Connection tab,choose the Lan Settings button
• Clear the automatically detect settings check box
• Select the Use a proxy server for your Lan check box
• Choose Advance button, and add "*.gcp-app.com" to the Exception List
• Choose Ok button and close Internet Option dialog box.

Step 3 Check SharePoint Central Administration Configure

Check you already created an App Management and Subscription Settings Service Application and that already started the App Management and Subscription Settings services on server.

• Services Applications

• Services on Server

• Configure App Urls(* Check)