Vyatta NOS documentation

Learn how to install, configure, and operate Vyatta Network Operating System (Vyatta NOS), which helps to drive our virtual networking and physical platforms portfolio.

Interaction between NAT and firewall

When considering NAT in relation to firewall, it is important to understand the traffic flow between NAT and firewall. In particular, it is important to keep in mind that firewall rule sets are evaluated at different points in the traffic flow. The scenarios in this section illustrate this point.