I have come to a company
where they place 2 firewalls connected to each other,
one is pix515e and sonicwall tz170, the system admin that he hand over me told me this for more security.
I found that there is double nating happeneing,from sonicwall to pix and from pix to wan,
I tried to remove sonicwall ,but there is a lot of features inside it, like anti spam ,anti virus,content filter........aslo if I remove pix (pix is the most trusted firewall) and i dont need Dmz in the middle of the 2 firewall because i can create it with the sonicwall with the third interface,
anybody can advise to keep them both or to remove pix?