I am new to the firewall world and I am setting up a Vyatta firewall in AWS VPC. I have four subnets in my VPC. I have launched one vyatta instance from the AMI in public subnet. So now my questions and doubts. The vyatta machine has debian 6 OS and one network interface eth0.
1. Do I have to add the interfaces of rest three subnets to my vyatta machine?
2. How can I enforce the trafiic entering to my VPC must go through the firewall? I guess this will not be possible in case of public traffic. I feel private traffic can be enforced.