MFA for RADIUS Servers Diagram

Adds Multi-Factor Authentication to an Existing RADIUS Server

The RADIUS Gateway enables existing RADIUS Servers to be supplemented with multiple factor authentication. Any LDAP attributes or a database on the SignOn Proxy can be used for MFA management.

Modernize Network Security Without Infrastructure Changes

Your network infrastructure requires stronger authentication, but replacing your existing RADIUS servers isn't practical or cost-effective.

The RADIUS MFA Challenge

  • Limited MFA Support: Existing RADIUS servers often lack modern multi-factor authentication capabilities or only support basic token methods.
  • Expensive Replacement: Replacing existing RADIUS infrastructure requires significant investment and complex migration projects.
  • Operational Risk: Changes to critical network authentication infrastructure introduce downtime and compatibility risks.

The Passthrough MFA Advantage

  • Preserve Your Investment: Keep your existing RADIUS servers and backend systems unchanged while adding MFA capabilities.
  • Modern MFA Methods: Add FIDO2, Smart Cards, TOTP/HOTP, and COTP push notifications to any RADIUS authentication flow.
  • Transparent Integration: Network devices and applications see no changes - the MFA layer is completely transparent to existing infrastructure.

Smart RADIUS Proxy with MFA Layer

The SignOn Proxy sits between your network devices and existing RADIUS server, intercepting authentication requests to add MFA verification while forwarding all other requests unchanged.

How It Works:

  • Selective Interception: Only authentication (Access-Request) packets are intercepted for MFA processing - all other RADIUS traffic flows directly to your existing server.
  • MFA Enhancement: Adds second-factor verification using FIDO2, Smart Cards, TOTP, or COTP before forwarding to your RADIUS backend.
  • Seamless Integration: Network devices require no configuration changes - simply point them to the SignOn Proxy instead of the original RADIUS server.
RADIUS MFA Passthrough Architecture

Secure Every Network Access Point

Add enterprise-grade MFA to all your RADIUS-authenticated infrastructure.

Network Switches

Secure administrative access to switches and routers with MFA while preserving existing RADIUS configurations.

WiFi Controllers

Enhance wireless network security by adding MFA to existing enterprise WiFi RADIUS authentication.

VPN Gateways

Strengthen remote access security by adding MFA to VPN authentication without changing client configurations.

Linux PAM RADIUS

Add MFA to Linux server authentication using PAM RADIUS modules without changing server configurations.

Choose Your MFA Method

Deploy the authentication factor that best fits your security requirements and user needs.

FIDO2 Security Keys

Hardware security keys providing the highest level of phishing-resistant authentication for critical infrastructure.

Smart Cards & PKI

Certificate-based authentication ideal for government and highly regulated environments requiring PKI compliance.

TOTP / HOTP

Standards-based one-time passwords using authenticator apps, compatible with existing OTP infrastructure.

COTP Push Notifications

User-friendly push notifications via the Comtarsia Authenticator app for seamless network access approval.

Powered by SignOn Proxy

This MFA for RADIUS solution is built on our flexible and robust authentication platform.

SignOn Proxy

The intelligent RADIUS proxy that sits between your network devices and existing RADIUS server. Configure passthrough mode to add MFA capabilities while preserving your current infrastructure investment.

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Strengthen Your Network Security Without Disruption

Ready to add enterprise-grade MFA to your existing RADIUS infrastructure? Contact us to discover how our passthrough solution can enhance your network security while preserving your current investment.