You can try the following two ways:
1: modem<--->router<--->Deeper<---->PC or laptop, this method can use 34.34.34.34 to access the dashboard.
2: modem<--->router<--->Deeper or PC &laptop, using this method, you can use PC & Laptop to access the router's dashboard and find the list of online devices. In the online list, there is a device whose name is dcn-nano. Using its LAN IP, you can access the Deeper dashboard.