I have a SonicWALL TZ200 running Firmware "SonicOS Enhanced 5.9.1.7-2o" I have wiped the configuration and booted to Factory Default Settings. I cannot connect to L2TP over IPSEC VPN using native Windows VPN client on Windows 10. If I switch out the TZ 200 with a "dumb" home router then the VPN connects fine. How can I stop the SonicWALL TZ 200 from blocking the VPN connection?
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