[IAG] Authentication forwarding failed when IAG is combined with Sangfor AF

Problem Description

IAG failed to perform authentication forwarding in conjunction with a company's next-generation firewall

Process——

1. Check the IAG configuration. A company found that the IP address filled in during forwarding configuration
   
2. Confirm that the company's authentication receiving port of the connected AF device is 1775, while IAG sends authentication data packets through port 1773 by default.

Root cause

The AF authentication port is port 1775, not port 1773

solution

After adding port 1775, the test is normal

Original Link

https://support.sangfor.com.cn/cases/list?product_id=22&type=1&category_id=6767&isOpen=true