FortiGate 100 D Firewall - want to update Firmware v5.2.1 build 742

[lovejit]

Hello Guys,

My Firewall having v5.2.1 build 742 and i am not able to find supported upgrade steps for this build model.

I was reading this doc but there is nothing for this build.

http://kb.fortinet.com/kb/microsites/search.do?cmd=displayKC&docType=kc&externalId=SupportedUpgradeP...

Please Provide me suggestions and let me which version should i update first to get the latest version.

Thanks

[ede_pfau]

I wonder why this topic is cropping up so often during the last days.

See for instance here https://forum.fortinet.com/tm.aspx?m=159948#159965 it outlines how you determine the recommended upgrade path from the Release Notes of each firmware patch. And of course there is a Upgrade Path tab when you log in to Service&Support (support.fortinet.com) but it's not quite complete - older versions have to be researched through the RN.