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troubleshooting Question

Hardened Linux Guest OS and can't log in via the console in vCenter

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I've hardened my Linux guest OS (RHEL 5) using a set of scripts that update PAM authentication. (My PAM knowledge is limited.) When I access the guest in vCenter using the console tab, I get a "Authentication failed" message from the guest (RHEL 5). This occurs for both root and non-root users. Anyone seen this? TIA
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