After upgrading Splunk Enterprise to 6.4.2, why are we getting a certificate error trying to upgrade the Splunk Add-on for Unix and Linux to 5.2.3?

[alexsayegh]

We've recently upgraded Splunk Enterprise to 6.4.2 and are getting an error while trying to upgrade the Splunk Add-on for Unix and Linux to version 5.2.3.

splunkd.log shows:

ERROR X509 - X509 certificate (CN=cdn.apps.splunk.com.....did not match any allowed names (apps.splunk.com)

How can we add the apps certificate to trusted to allow upgrades using Splunk Web?

[adhoke_splunk]

Your server.conf seems to have only apps.splunk.com as the SSL common name. If you want to allow client with CN=cdn.apps.splunk.com then you will have to update applicationsManagement stanza:
https://docs.splunk.com/Documentation/Splunk/6.4.2/Admin/Serverconf