Why do I see the error "Login failed-Incorrect Radius challenge!" when authenticating with Duo and the SonicWALL NetExtender client?
![Amazon.com: Dell Sonicwall 01-SSC-0218 Soho Wireless-N Security Appliance 5 Ports 10MB/100MB LAN, Gige 802.11 B/A/G/N : Electronics Amazon.com: Dell Sonicwall 01-SSC-0218 Soho Wireless-N Security Appliance 5 Ports 10MB/100MB LAN, Gige 802.11 B/A/G/N : Electronics](https://m.media-amazon.com/images/I/7134ysKU+7L.jpg)
Amazon.com: Dell Sonicwall 01-SSC-0218 Soho Wireless-N Security Appliance 5 Ports 10MB/100MB LAN, Gige 802.11 B/A/G/N : Electronics
![Duo Two-Factor Authentication for SonicWALL SRA or SMA 100 Series SSL with RADIUS Auto Push for VPN Client Access | Duo Security Duo Two-Factor Authentication for SonicWALL SRA or SMA 100 Series SSL with RADIUS Auto Push for VPN Client Access | Duo Security](https://duo.com/assets/img/documentation/sonicwall/sonicwall_network_diagram.png)