Installation guide
D6600 NetCom
Operation
D6600 NetCom System Guide
© 2004 Bosch Security Systems Page 19 4998122712D
Internal IP Address Source Port
192.168.1.11 7700
192.168.1.12 7701
192.168.1.13 7702
Table 7 shows an example of what the NAT table
remembers when packets are sent out to a destination. An
outgoing packet is sent to an IP Address with both a Source
and Destination port in that packet. The Destination port
is the port number that the device is listening for data.
After it receives the data it will process it and send a packet
back to the IP Address that sent the data using a
Destination port that is the same as the Source port that
sent the data.
Table 7: NAT Table
When the data is returned to the router or firewall software, it directs the returning packet to the correct Internal IP
Address based on the NAT table