How does the Fortigate firewall deal with an XFF header inserted
I would like to have Fortigate insert an X-Forwarded-For header by using the "Preserve Client IP" option available with a load balancing virtual server. My question is: If there is an upstream device that inserted the XFF header before the Fortigate, does the fortigate add a second value to the first. So:
X-Forwarded-For: value1 inserted by upstream device, value2 inserted by Fortigate
Or does it add a second occurance of the XFF header, like:
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