---
title: Using SMS for MFA
slug: reference-guide-3-0-0/using-sms-for-mfa
description: Learn how to send SMS messages using HTTP or SMPP and generate OTPs through Single Connect. Adjust your MFA SMS settings easily in the Administration's System Config Man section by searching for "2fa" in the "Parameter Name" field. Set and customize vario
docTags: 
createdAt: 2022-07-31T18:12:30.000Z
---

There are two methods to send SMS: over HTTP (via SMS Proxy), or over SMPP (via SMSC). 
Instead of using the Single Connect mobile app, OTPs can be generated by Single Connect and sent via SMS.
To adjust the MFA SMS Settings:

1. Navigate to** Administration** > **System Config Man.**
2. Enter **2fa **in the “Parameter Name” field and click the **Search** button.
3. Set the value of the **iga.2fa.sms.http.body**, **iga.2fa.sms.http.headers**, **iga.2fa.sms.http.secret.body**, **iga.2fa.sms.http.url**, **iga.2fa.token.create.count**, **iga.2fa.sms.smpp.body**, **iga.2fa.sms.smpp.secret.body**, **iga.2fa.sms.http.timeout **and **iga.2fa.token.timestep** parameters.

![](https://api.archbee.com/api/optimize/g9cApVza9NIhSh0pjZYtA/Crig3Zu3Y7uyzszWnYQuV_image.png "SMS Settings for MFA")