Cobalt Digital Inc Cobalt Qube 2 User Manual page 65

Services on the Qube 2
For outgoing packets, NAT translates a private IP address (an IP address
that is not globally unique) on the internal network into the legal address
of the secondary interface; packets are then forwarded onto the Internet.
For incoming packets, NAT does the opposite. NAT receives a packet
from the Internet and translates the legal address of the secondary
interface into the private IP address on the internal network.
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