Two Factor Authentication for Linux
miniOrange Two Factor Authentication (2FA) SSH Module provides a secure way to login into the linux servers that enhance the security and makes the brute force attacks more difficult.
Two Factor Authentication (2FA) on top of SSH Access, adds an extra layer of security to increase the identity assurance and reduce risk and exposure.
miniOrange Two Factor Authentication (2FA) module can be installed on Linux operating systems
to add Two-Factor authentication on the top of local and Remote login.
miniOrange supports following Authentication Methods for Two Factor Authentication (2FA):
- miniOrange Push Notifications (miniOrange Authenticator App)
- miniOrange Soft Token (miniOrange Authenticator App)
- OTP Over SMS / Email
- Google Authenticator
- Hardware Token
The Module has been well tested on the following Linux distributions.
( If you have other than the following mentioned distributions please contact us )
- RHEL based systems
e.g. Red Hat, CentOS
We can connect with any External IDP/Directory
miniOrange provides user authentication from external directories like ADFS, Microsoft Active Directory, Azure AD, OpenLDAP, Google, AWS Cognito etc. It also provides user authentication with other IDPs like Shibboleth, PING, Okta, OneLogin, KeyCloak and many more.
Can't find your IDP ? Contact us on firstname.lastname@example.org. We'll help you set it up in no time.
Step by step guide to enable Two Factor Authentication on SSH access (Linux):
Step 1: Choose Your User Directory
1.1: Setup AD as User Directory
- Log in to miniOrange dashboard from the Admin Console.
- From the Side Menu, Click on User Stores >> Add User Store
- Select User Store type as AD/LDAP.
- STORE LDAP CONFIGURATION IN MINIORANGE: Choose this option if you want to keep your configuration in miniOrange. If active directory is behind a firewall, you will need to open the firewall to allow incoming requests to your AD.
- STORE LDAP CONFIGURATION ON PREMISE: Choose this option if you want to keep your configuration in your premise and only allow access to AD inside premises. You will have to download and install miniOrange gateway in your premise.
- Enter LDAP Display Name and LDAP Identifier of your choice. Select Directory Type as Active Directory.
- Enter the LDAP Server URL or IP Address against LDAP Server URL field.
- Go to AD FS-> Domain-> respective Users -> Properties-> Attribute Editor. Now copy the value of distinguishedName and paste it against Bind Account DN.
- Enter the valid password for the user from above step.
- Search Base is the location in the directory where the search for a user begins.
- If you want to add extra conditions on user search you can add it in Search Filter. Select a suitable Search Filter from the Drop-Down. To use custom Search Filter select "Custom Search Filter" option and provide the search filter in the input field that shows up.
- You can also configure following options while setting up AD.
Here's the list of the attributes and what it does when we enable it. You can enable/disable accordingly.
||All user authentications will be done with LDAP credentials if you Activate it
|Sync users in miniOrange
||Users will be created in miniOrange after authentication with LDAP
||If LDAP credentials fail then user will be authenticated through miniOrange
|Allow users to change password
||This allows your users to change their password. It updates the new credentials in your LDAP server
|Enable administrator login
||On enabling this, your miniOrange Administrator login authenticates using your LDAP server
|Show IdP to users
||If you enable this option, this IdP will be visible to users
|Send Configured Attributes
||If you enable this option, then only the attributes configured below will be sent in attributes at the time of login
- Click on Save. After this, it will show you the list of User stores. Click on Test Configuration to check whether you have enter valid details. For that, it will ask for username and password.
- On Successful connection with LDAP Server, a success message is shown.
- Click on Test Attribute Mapping.
- Enter a valid Username. Then, click on Test. Mapped Attributes corresponding to the user are fetched.
- After successful Attribute Mapping Configuration, go back to the ldap configuration and enable Activate LDAP in order to authenticate users from AD/LDAP.
1.2: Setup miniOrange as a User Store
- Log in to miniOrange dashboard from the Admin Console.
- There are 3 ways to setup miniOrange as an Identity Source
Step 2: Configuring Two Factor Authentication (2fa)
- Login into your End-User Dashboard using Active Directory Credentials.
- Select Configure 2FA from left panel.
- Browse through the Second factor options and choose an appropriate method to be used by the particular End-User during login.
- In this guide, we have selected the method "OTP OVER SMS". You can explore the guide to setup other methods here.
- Click on configure/reconfigure "OTP OVER SMS".
- Enter you phone number along with the necessary country code and click on SAVE below. After the Phone details are saved successfully, click on the Save button on the top bar to set this as your 2FA method.
- To use a particular method of 2FA, we configure that method first and then select the method and click on SAVE.
- Currently used method is denoted by green color.
- Click Here to configure the 2FA method from miniOrange Admin dashboard.
- Click here for step by step guide to configure 2FA methods for end-users .
Step 3: Configure MO-SSH Module
- Install the following extensions which are required to proceed for further configuration.
curl, jq and python
- Download the “mo-ssh” file.
- Open your Linux terminal and make sure you are the root user.
- Execute the following command to install “mo-ssh” module.
# bash mo-ssh install < path >
e.g. # bash mo-ssh install /usr/local/bin
- Enter the miniOrange account credentials.
- Proceed for the following steps once you have successfully logged in.
- Execute the below command to enable the Two Factor Authentication (2FA) for the users.
‹path of mo-ssh file› enable ‹local_username› ‹miniOrange_email› ‹phone_number›
e.g. # /usr/local/bin enable ec2-user email@example.com ‹ your phone number ›
- Execute the below command to restart the sshd service.
$ service sshd restart
Step 4: Test your setup
- Initiate SSH into your system.
- Enter your username.
- It will prompt for the Two Factor Authentication (2FA) verification.
- Enter the token.
For further details refer :