3/10/2024 0 Comments Google authenticator totp and totpThis article highlights not only a two-factor authentication solution, but also the usage of iRules within APM policies. After creation, an access policy is applied to a virtual server to provide security, authentication services, client inspection, policy enforcement, etc. Access policies are rule sets, which are intuitively displayed in the UI as flow charts. APM allows for far more granular control of network resources via access policies. In this follow-up, we will be covering implementation of this solution with Access Policy Manager (APM). The first article in this series highlighted two-factor authentication with Google Authenticator and LDAP on an LTM. This Tech Tip is a follow-up to Two-Factor Authentication With Google Authenticator And LDAP. This process is explained in the next section. Calculation as you will later see is well-documented and relatively easy to implement in your language of choice (iRules in our case). It uses an open standard (defined by RFC 4226), which means that it is well-tested, understood, secure. It is low cost due to the proliferation of smart phones and is available from the “app store” free of charge on all major platforms. Using Google Authenticator as a soft token application makes sense from many angles. This is accomplished by using Network Time Protocol (NTP) to synchronize the clocks of each device with the correct time of central time servers. Because the token and the authentication server are disconnected from each other, the clocks of each must be perfectly in sync. The TOTP uses a shared secret and the current time to calculate a code, which is displayed for the user and regenerated at regular intervals. This differs from a username and password combination, which is “something you know,” but could be easily duplicated by someone else. It fits the definition of “something you have” as it cannot be easily duplicated and reused elsewhere. It can be used by itself or to supplement another authentication method. This fits our definition as the device an be used to make phone calls, check email, surf the Internet, all in addition to providing a time-based one-time password.Ī time-based one-time password (TOTP) is a single use code for authenticating a user. In the context of this article we will refer to mobile devices as a soft tokens. A soft or “software” token on the other hand has other uses beyond providing an authentication mechanism. A “hard token” implies that the device is purpose-built for authentication and serves no other purpose. The term “disconnected” refers to the absence of a connection between the token and a central authentication server. The most common method for implementing a second authentication factor has been to issue every employee a disconnected time-based one-time password hard token. Until the past few years, two-factor authentication in its electronic form has been reserved for high security environments: government, banks, large companies, etc. The application of a keyed padlock and a combination lock to secure a single point would technically qualify as two-factor authentication: “something you have,” a key, and “something you know,” a combination. The OpenOTP server previously mentioned also provides RADIUS authentication services with multifactor.Two-factor authentication (TFA) has been around for many years and the concept far pre-dates computers. So for your hardware VPN solution, you can authenticate the VPN clients using RADIUS against the MFA server, using a code or PIN plus a TOTP code (as described in the parent post above) as the password. If you want to enable MFA for service under your control (such as Active Directory), then you can implement a 3rd-party solution, such as Duo (for a cloud-based system) or an on-premises, software based system such as Wright () or OpenOTP from RCDevs ().įor devices or services that don't support MFA but do support RADIUS, you can set up an MFA server that also serves RADIUS clients. If you want to enable MFA for other online accounts, you'll be limited to whatever the provider offers - if they offer anything at all. To be clear, that only enables MFA for your Google account.
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