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rayha
rayha
New Member
February 1, 2024
Question

Re-direct loop to login page

  • February 1, 2024
  • 1 reply
  • 3176 views

Hi all,

 

        Has anyone encountered when you successfully login, it does not direct you to the fortigate main page but to the login page again? I tried several times on the edge and chrome and the result still the same. I am accessing this direct from internet

 

      I had no such issue when i access via the management port. 

      Anything to do with my browser settings?

 

 

 

 

 

1 reply

pminarik
Staff
pminarik
Staff
February 1, 2024

This has been known to happen when the standard TCP/80/443 ports for HTTP/HTTPS are proxied by some other network device in-between, changing the source MAC address of the packets, but the captive portal ports (by default 1000/1003) are not. by default authenticated sessions are bound to both the IP and the MAC addr, which is disrupted by that sort of proxying.

 

You can confirm this by running a packet capture on the FortiGate for a given client, focusing on the 80/443/1000/1003 ports, and checking if the src MAC changes. If yes, you will need to apply the following change:

 

config user setting

set auth-src-mac disable

end

 

https://community.fortinet.com/t5/FortiGate/Technical-Note-Authentication-Page-Looping-Issue/ta-p/197967

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