Portal security
Portal is the window into your GIS system and has many settings for keeping it secure.
Fundamentals of Portal security
Security for Portal for ArcGIS is just as important as ArcGIS Server security. Portal is just that, a portal into your data, services, maps, and applications.
Web-tier authentication
Web-tier authentication occurs at the web server tier. If your organization uses Active Directory, you can use IWA to enable an automatic or single sign-on experience through web-tier authentication using the ArcGIS Web Adaptor for Internet Information Services (IIS). Likewise, if your organization uses LDAP, it can be used with ArcGIS Server with your Web Adaptor deployed to a Java application server such as Apache Tomcat or IBM WebSphere.
Note
With web-tier authentication, administration must be allowed through the Web Adaptor. This allows users in the enterprise identity store to publish services from ArcGIS Desktop on their local PCs. To publish, they must connect to ArcGIS Server...