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FortiGate Voice Version 4.0 MR1 Administration Guide
10 01-410-112851-20100601
http://docs.fortinet.com/ • Feedback
The following table shows some examples of how to choose an IP number for a device
based on the information given. For internal and dmz, it is assumed in this case there is
only one interface being used.
Table 1: Examples of the IP numbering
Location and device Internal Dmz External
Head Office, one FortiGate 10.011.101.100 10.011.201.100 172.20.120.191
Head Office, second FortiGate 10.012.101.100 10.012.201.100 172.20.120.192
Branch Office, one FortiGate 10.021.101.100 10.021.201.100 172.20.120.193
Office 7, one FortiGate with 9
VDOMs
10.079.101.100 10.079.101.100 172.20.120.194
Office 3, one FortiGate, web
server
n/a 10.031.201.110 n/a
Bob in accounting on the
corporate user network (dhcp)
at Head Office, one FortiGate
10.0.11.101.200 n/a n/a
Router outside the FortiGate n/a n/a 172.20.120.195