Hello everyone, i have here a question for you.
here is my situation, i have a network with 2 internet connections,behind 2 routers. I have other routers that connects to another 2 systems (private network).
What im looking for is, a hardware firewall, so that the 2 internet connections could be more secure.

what im thinking is, a SonicWall Pro 5060(or CheckPoint) -->(maybe a sniffer)--> Proxy-->Network , and a linux firewall on one of the private systems, because one of them have its own internet connection, so if an attacker wanna get acess, he could attack from there, because that connection is impossible to pass through the hardware firewall.

I would like your expert opinion, about the firewall, and about the implementation of this security.

Thanks all for your help.