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Routing under DHCP, Static IP, and PPPoE
153
BODi rS BD1000 User Manual
C • Applications
Routing under DHCP, Static IP, and PPPoE
The information in this section only applies to situations where the BD1000 operates with to a WAN connec-
tion under DHCP, Static IP and PPPoE.
Routing via Network Address Translation (NAT)
When the BD1000 is operating under NAT mode, the source IP addresses of outgoing IP packets are trans-
lated to the WAN IP address of the BD1000. Therefore, with NAT, all LAN devices share the same WAN IP
address to access the Internet (i.e. the WAN IP address of the BD1000). Operating the BD1000 in NAT mode
requires only one WAN (Internet) IP address. In addition, operating in NAT mode also has security advan-
tages because LAN devices are hidden behind the BD1000, not directly accessible from the Internet and hence,
less vulnerable to attacks. The following figure shows the packet flow in NAT mode:
Figure 118. Routing via NAT Application
Routing via IP Forwarding
When the BD1000 is operating under IP Forwarding mode, the IP addresses of IP packets are unchanged; the
BD1000 forwards both inbound and outbound IP packets without changing their IP addresses. The following
figure shows the packet flow in IP Forwarding mode:
Figure 119. Routing via NAT Application