This application communicates with Duo's service on TCP port 443.
DELL AVENTAIL VPN CLIENT UPDATE
If you have issues with the v10 "Contemporary mode" and cannot update your device firmware, access the "Classic mode" login page by changing the VPN login URL in your browser from to There is no setting in the SMA config to force use of "Classic mode". The issue displaying the Duo prompt in "Contemporary mode" was fixed in SMA firmware update 10.2.1.0-17. This mode may prevent display of the Duo prompt. Sonicwall introduced a new "Contemporary mode" for SMA in v10.2. SMA 1000 series devices running v12+ firmwares.SMA 100 series devices or upgraded SRA devices with 8.6.x firmwares (note that v8.x firmwares are end-of-life per SonicWall).SMA 100 series devices with 9.0 firmwares before 9.0.0.2-13.The Duo web-based prompt does not support: SMA 100 series devices (SMA 200, SMA 400, and SMA 500v) with v10 firmware.SMA 100 series devices (SMA 200, SMA 400, and SMA 500v) with v9 firmware as of 9.0.0.2-13sv.SRA firmware versions up to 8.5.x (note that v8.x firmwares are end-of-life per SonicWall).The Duo web-based prompt is compatible with the following: Other types of SonicWall devices (such as the SMA 1000 series, NSA series, or Aventail) may also work with Duo's RADIUS Application.
The Duo Prompt shown in browsers does not work with SonicWall client VPN applications. If you are using SonicWall Mobile Connect client or SonicWall's Global VPN Client using IPsec then see the VPN Client Instructions to configure the SonicWall device to use Duo Security's push authentication. Duo integrates with your SonicWall SRA or SMA 100 Series SSL VPN to add two-factor authentication to browser VPN logins, complete with inline self-service enrollment and Duo Prompt.