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Enable One-Time Password (OTP) Using Phone or
Email
If you do not have the ability to use one of the above highly recommended solutions for secondary factor
authentication, SonicWall's SMA 100 series does offers a One Time Password (OTP) option that can be used as
a secondary factor (2FA). This token can be sent to the requesting individual via email or SMS text.
To get started with the OTP setup, you should be prepared to choose the method that suites your
organizations need the best. A User can be given the option to choose any of the three if the admin desires to
allow this.
Configuring One-Time Passwords for Email
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NOTE:
Email is sent as a relayed message from the SonicWall SMA 100 series through a mail host. You
must ensure your mail host can accept the relay. Most mail hosts will allow this with password
authentication and using special designated port. Some require specific types of transport methods in
order to relay. Please have this information ready prior to proceeding with the below instructions.
1. In the left menu, navigate to Log > Settings.
2. Navigate to the Event Logging and Alerts section.
3. In the Mail Server field, enter the mail server that the appliance will send the relay request to.
Example: smtp.office365.com
4. In the SMTP Port field, enter the recipient port details for relay requests. Example: Port 587
5. In the Mail from Address field, enter the sender's email address. This will be the display email
address from which the emails are sent. Please note, some email relay services require this address to
be a valid account. If you do not wish to have your email displayed, then consider adding an
additional email user to your account with the appropriate name you wish to use here.
6. Enable SMTP Authorization. Most mail relays require authentication. If you know your organization
does NOT require this – then do not enable this field. However, if you are unsure, or are sure they do
require, then please enable this setting.
7. If SMTP Authorization is enabled, now enter the username and password used to log into your email
server.
8. If your mail service requires a secure transport to sign in, please select it next to the SMTP Secure
Protocol. Most mail services will require TLS to authenticate and relay. Some services will allow SSL
but is less frequent and less secure.
9. Click Accept. If successful, you will receive a green bar at the top indicating your settings have been
saved.
SonicWall SMA 100 Series
Security Best Practice Guide
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