I have a M510 managed by SZ connected only with the LTE Uplink, it works fine using the function of NAT&DHCP in an open WLAN or with a WPA2 SSID.
The problem is when I try to configure a external Captive portal using WISPr, I configure some webpage in the walled garden, and when I connect a device to the SSID, I have no access so resolve the name of the link declared in the walled garden.
I try with the command DNS-Spoof in the M510 but doesn't recognize. If I use the IP directly it works.
There is a limitation in the M510 or is a bug?
PD: I have another AP connected using the eth interface to internet and works without problem.