We are using Jira 4.2.2 with crowd. Crowd uses a filter when connecting to our Active Directory server. I had modified that AD filter to include some people that were excluded from the original one. I tried to check with Jira that these users were indeed now included when I was prompted for the jira-admin password. It failed to authenticate jira-admin. Other users were nevertheless still able to be authenticated.
A little later, Jira still failed to authenticate jira-admin, but instead of blankly refusing access, it asked for a capcha. And it keeps asking for a capcha, and access is never achieved. And then the other users were also being refused access, and Jira is currently unusable.
It is a bit dificult to be sure at this point, but I have some questions that may help you to identify what is the root cause.
I hope this information has helped, but if you are still facing problems, please open a support request at href="https://support.atlassian.com">https://support.atlassian.com and attach both Crowd and JIRA logs:
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