Hi I see the new instructions of a2Billing 1.4 is for Debian but also reference to centos.
Here I go to make clear A2billing not have any Bug with Centos for the normal repository.
We test also teh version of jasonlitka reference in the Trac of A2billing
http://www.asterisk2billing.org/cgi-bin ... ticket/501This version of Centos have serious Bugs and external user is possible get acces to the server and download any file
Very possible you get any other security iusse BUt we no test at all.
Please use the normal version of Centos.org and not upgrade with the jasonlitka version.
We test not only a2billing also other php script and all is compromise with the php and apache versions of jasonlitka
Anyway Centos.org is near to the end because the project go to close for not get donations.