How to use Fortigate Load Balancer

• 1 Enable Load Balance Feature
• 2 Import a Certificate
• 3 Create a Virtual Server
• Create a http virtual server
• Create a https virtual server
• 4 Redirect http to https
• 5 Use virtual server to create firewall policy
• 6 Add DNS Record
• 7 Summary

1 Enable Load Balance Feature

2 Import a Certificate

You can import your own certificate to implement your custom https connection

3 Create a Virtual Server

Create a http virtual server

If you do not have your own certificate and do not want to use fortigate default certificate, you can set to http type

Create a https virtual server

If you import your own certificate, your can set to https type and select your own certificate; otherwise, your can use fortigate default certificate to implement a https connection

SSL Mode:

• Client <-> FortiGate: Client(https) --> Fortigate(https) --> Server(http)
• Full: Client(https) --> Fortigate(https) --> Server(https)

4 Redirect http to https

Add a Firewall Policy to redirect 80 to 443 so that client can auto access to https://uat.example.com from http://uat.example.com

5 Use virtual server to create firewall policy

You must select Proxy-based mode so that you can find virtual server in policy Destination

6 Add DNS Record

Add uat.example.com and prd.example.com's type A resolution to Fortigate WAN IP.

7 Summary

Finally, you can implement an architecture like that:

In my case, the IP 10.210.0.2 is a real server in internal network, but IP 10.210.11.170 is a SLB in AlibabaCloud