Created on 12-06-2007 12:00 AM Edited on 05-24-2023 12:19 AM By Anthony_E
To avoid publication of public IP addresses that belong to Fortinet or any other organization, the IPv4 addresses used in Fortinet technical documentation are fictional and are from the private IP address ranges defined in RFC 1918: Address Allocation for Private Internets, available at
Public and Private IP addresses:
A Private IP address is an IP address that cannot be used in the Internet. Private IP addresses are reserved for use on private networks.The private IP address ranges are:
- 10.0.0.0 - 10.255.255.255
- 172.16.0.0 - 172.31.255.255
- 192.168.0.0 - 192.168.255.255
A public IP address is an IP address that can be used on the public Internet. Most other IPv4 IP addresses are public IP addresses, with the exception of the addresses described below.
In Fortinet technical documentation, to avoid publication of public IP addresses that belong to real organizations, private IP addresses are used for both private and public IP addresses in documentation examples.
IP multicast addresses:
Reserved multicast IP addresses are safe to use in documentation because they do not belong to anyone. Fortinet recommends using addresses in the range 126.96.36.199 - 188.8.131.52 for hosts that do not need access to the Internet or another network. A majority of the remaining multicast addresses are already being used for specific projects and companies.
The loopback address - 127.0.0.1 - is instantly recognizable as such by network administrators and developers. This address is also known as the localhost address.
RFC 3849: IPv6 Address Prefix Reserved for Documentation(http://www.ietf.org/rfc/rfc3849.txt?number=3849) states that the IPv6 address prefix 2001:DB8::/32 is reserved for use in documentation.
Special-use TEST-NET addresses:
RFC 3330: Special-use IPv4 Addresses
For additional information that includes a summary table, see RFC 3330: Special-Use IPv4 Addresses, available at