HOW TO
The arcgis.keystore file holds the private key used to run the internal Tomcat webserver on port 6443. In instances where switching the protocol to HTTP Only and back to either HTTP and HTTPS or HTTPS Only fail, or the protocol is set to HTTPS Only and port 6080 is inaccessible, a method to regain access to the ArcGIS Server site is important to avoid a complete disk recovery scenario. There are a few potential causes for the default arcgis.keystore file to become corrupted or unusable, including running out of disk space, a modified server.xml file in the Tomcat configuration, disk I/O errors, and faulty hard disk drives.
Use the following steps to regain access to ArcGIS Server Manager or ArcGIS Administration Directory.
C:\Program Files\ArcGIS\Server\framework\runtime\tomcat\conf\
C:\Program Files\ArcGIS\Server\framework\etc\
netstat -ano | findstr "6443"
Alternatively, run the Configure ArcGIS Server Account wizard to regain the full permission on the following directories, if the directories permission is set to readonly.
C:\arcgisserver C:\python27 C:\Program Files\ArcGIS\Server
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