Wondering if someone can help me shed a little light or give me some guidance on how to resolve my problem.
Purchased a SIM card from Tmobile for failover WAN. Tried it in both my 20X (directly installed) and in my 20X and 20 via a Netgear LB1120 and the WAN ports. LB1120 is in bridge mode and routers are getting WAN IP address from Tmobile. Internet access available. Put in my DDNS provider in the appropriate WAN connection dialogs and verified from the DDNS provider’s website that the routers update the provider with the IP address. Also in WAN dialog enabled reply to ECMP. Setup remote access key and password. VPN passthrough enabled on LB1120, but this shouldn’t be necessary for directly installed SIM in the 20X.
Pinging the DDNS hostname and WAN IP addresses of the SIM cards fails. Accordingly, VPN fails. Tested SIM card from my Verizon phone with same results.