Fortigate explicit webproxy chaining problem

[Hehomarco]

Hello everyone, i have a problem with the proxy chaining feature and explicit webproxy. I use Kerberosauthentication with explicit proxy on two fortigates 2000e and 500e. Now i want to redirect one url from the explicit webproxy from the 2000e to the 500e with the web proxy forwarding servers feature. The forwarding works fine and i have a proxyrule at the 500e that allows all to reach the forwarded address without the need to be in a special group or authentication. But when the forward from the url from the 2000e explicit proxy takes place then i get the replacementmessage authorization failed. Can anybody help me ?

Thank you 

[emnoc]

Did you inspect the  HTTP headers?  if Authorization  is using Kerberos how does the 2 proxy work?

[Hehomarco]

Hello,

what do you mean with inspect the HTTP headers ? The second proxy (500E) also use Kerberos but for testing i made a rule like this.

Source: all

Destination: all

Shedule: always

action: accept

If my forwarded URL goes to the second proxy (500E) than it should be allowed by this policy without authentication because i dont have any group at this policy.

[emnoc]

I use Kerberosauthentication with explicit proxy on two fortigates 2000e and 500e.

What do you mean by kerberos and two fgt?

Inspect headers means dump  the HTTP headers on both paths to the two proxies?

Also what did diag debug flow show you?