My Digi WR21 Transport doesn’t answer PING from the WAN. How do I open Ping?
By default the Digi Transport routers do not have firewall enabled.
If you have the wan address of the router and can not ping the router this is down to the address being a private address that is not allowed on the internet or the address is firewalled / Natted by the wan provider.
You would need to talk to the provider if private address to give a public address and if natted you would need to use a outbound vpn tunnel when the transport build the connection out to another device on the internet