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FortiGate DHCP scope option

2012.08.22 - posted in Fortinet

Apparentely, FortiGate dhcp scope option data has to be entered in hexadecimal format. So here goes, to have the DHCP server serve option 150 with the IP 192.168.10.10:

  • Navigate to the DHCP server for the voice subnet
  • Check the Option checkbox
  • For Option 150, enter Code = 150, Option = C0A80A0A

It is C0A80A0A because:

C0 = 192
A8 = 168
0A = 10
0A = 10

If you’re not fluent in decimal-hex conversion, use a calculator to have the conversion done for you :)

More info can be found here: http://firewallguru.blogspot.nl/2010/02/custom-dhcp-options-in-fortispeak.html.

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