This blog post on the Secure Links blog provides a synopsis of which TMG functions a FortGate appliance will be able to take over and some of the differences between the two. If you’re still looking for that perfect replacement, be sure to check out the info here:
http://www.securelinks.net/1393/replacing-microsoft-tmg-with-fortinet-fortigates/
I have done the replacement of TMG with FortiGate and i was very glad with the results.
The setup is 2 x FortiGate and 1 x FortiAnalyzer. Once i tested this setup , i have continued to work with these products and have completed half a dozen installations till now.
Regards,
Tarek
Is posible to monitor as TMG the traffic in real time?
any advice how to export the rules set(network/firewall rules) to the fortigate? or did you do the manual job..?