The following firmware releases are strongly recommended by SecureLayers and are considered mandatory for support
Updated: May 17, 2012

ForitGate series

• 3.0 GA - MR6 series - not supported - end of support
• 3.0 MR 7 patch 10 (build 754)
• 4.0 GA - not supported upgrade to MR1
• 4.0 MR 1 patch 10 (build 217)
• 4.0 MR 2 patch 11 (build 342) 
  
• 4.0 MR 3 patch 7 (build 525) <-- stable

FortiAP series

• 4.0 MR3 patch 7 (build 225)

FortiAnalyzer series

• 4.0 MR2 patch 8 (build 416)
• 4.0 MR3 Patch 3 (build 654)

FortiManager series

• 4.0 MR2 patch 8 (build 416) <-- recommended
• 4.0 MR3 patch 4 (build 640)  

FortiClient series

• 4.0 MR2 patch 7 (build 302)
• 4.0 MR3 patch 3 (build 445)

• 4.0 MR2 patch 4 (build 399)
• 4.0 MR3 path 1 (build 495) <-- recommended

FortiWeb series

• 4.0 MR3 patch 7 (build 557)