Regarding the problem of STM32F4 series accessing the external network through a router, Xiaobai needs help

anylr

Regarding the problem of STM32F4 series accessing the external network through a router, Xiaobai needs help [Copy link]

The STM35F4 series is used, and the network part uses LAN8720 and HY911105

Currently, the board can communicate with the computer's network debugging assistant through the router.
The computer's network debugging assistant can communicate with the server through the router.
However, the board cannot communicate with the router through the router.

Initial judgment is that the board can communicate with the computer's network debugging assistant because they are in the same intranet.

So the current problem may be that the board cannot access the external network

According to the information and solutions on the Internet, the problem has not been solved yet. It has been stuck for more than half a month.

I hope someone can take the time to give me some pointers, I'd be very grateful