After DNS Servers has changed, the DOI login page is throwing an authentication failure error.
Release : 21.3
New DNS Server details are not updated for the OpenShift.
Resolution:
Change the DNS Operator on Open Shift
Exp: https://docs.openshift.com/container-platform/4.8/networking/dns-operator.html
Workaround:
https://knowledge.broadcom.com/external/article?articleId=257031#/
The above KB talk about k8s but it is applicable for Openshift environment as well.