[SOLVED] Any admin pg command redirecting to customer portal

[pgoel]

Otrs version 3.3.1
OS: Centos 6.4
After logging in if I go to admin page and try to change something (anything*) the system redirects me to a customer login page and I get the following in the URL:

http://test.fibertown.com/otrs/index.pl ... 7547dHcFJe;
or
http://test.fibertown.com/otrs/index.pl ... hange;ID=6

System log shows:
Found no $GroupID for users!

And I cannot get into sysconfig. I get the following error:

Secure mode needs to be enabled!
Secure mode will (normally) be set after the initial installation is completed.
If secure mode is not activated, activate it via SysConfig because your application is already running. (Cliking on the link to enable it again takes me to the customer portal)

No changes made after upgrade. Was working fine until last week. Removed ZZZAAuto and ZZZAuto to reset but no success.
Thank you for your assistance.

[crythias]

Found no $GroupID for users!

means "users" as a "group" has been renamed/is no longer available/has been deleted and therefore the ID can't be found.

[pgoel]

I apologize, it has been fixed. A security module "SecRuleEngine" was blocking access from apache. I will mark the topic as [solved]

Thank you once again