I'm trying to use ACLs, and as suggested I switched the security strategy to `unanimous`.

Since then, several URLs don't authorize my user to access anymore.  

However it should according to my firewall configuration (I'm able to control this with default strategy).

I understand that unanimous strategy denies access if at least one voter doesn't grant.

So the question is:

For a given request in case of denied access,  

how to know which are the involved voters in order to know which one is denying access ?