Understanding how the rules are applied is considered an art, especially when an internal system is hiding behind an NAT. For example, if you are able to admit your Kali attack boxes an element to the internal network either by MAC filter bypass or physically plugging in the LAN cable, you have now added the element to the corporate network with a local IP address as shown in the following screenshot. Automatically, DHCP information is automatically updated in your /etc/resolv.conf file:

Many enterprises implement a DHCP proxy to protect themselves; this can be bypassed by adding a static IP address. Some DHCPs allow you to add the element to the network with HTTP authentication enabled; this information can be captured by performing man-in-the-middle attacks.