Configuring incorrect Portal forward proxy settings makes the Portaladmin API unaccessible.

Workaround

Taken from BUG-000106664 and confirmed working in 11.5, 11.3 and 11.1:

1. Stop Portal.

2. Using a text editor open <C:\Program Files\ArcGIS\Portal\framework\runtime\tomcat\conf\catalina.properties>

3. Comment out:

http.proxyHost =

https.proxyHost =

http.proxyPort =

https.proxyPort =

nonProxyHosts =

4. Save catalina.properties file

5. Using a text editor open <C:\Program Files\ArcGIS\Portal\framework\etc\portal-config.properties

6. Comment out:

http.proxyHost =

https.proxyHost =

http.proxyPort =

https.proxyPort =

nonProxyHosts =

7. Save portal-config.properties file.

8. Start Portal service.

9. Log in to Portaladmin.

10. Select System->Properties->update.

11. Remove the forward proxy json settings or update them to include the portal hostname in the nonProxyHosts.

12. Select Update Properties. (this updates it in the internal postgres db)

Steps to Reproduce