Situation

# 刪掉PPPoE的預設路由發現還是存在
The PPPoE default route persists even after being deleted.

Solution

[1]
Log in Fortigate WebUI > Network > Interfaces

[2]
Click "WAN1" > Edit

[3]
Address > Retrieve default gateway from server > disable

Check

# 檢查路由表
Fortigate CMD > get router info routing-table all