Passwordless 1FA Authentication
for Linux
Introduce 1FA passwordless with decentralized credentials with AuthNull.
Passwordless logon for Active Directory accounts
Enable Active Directory authentication 1FA with passwordless. Works for Windows and Linux authentication.
Passwordless for Service Accounts
Detect and protect unprotectable service accounts by introducing 1FA passwordless, or Delegated M2M authentication without human intervention.
Learn more →Passwordless for Apps
Launching soon — passwordless for your OIDC apps. Configure, issue and authenticate with OIDC / SAML2 apps with passwordless.
Passwordless — How does it work?
From install to passwordless in under an hour
A single package install drops the AuthNull PAM module onto your Linux host. No firewall changes, no infrastructure rework.
Choose between 1FA passwordless, MFA, or Delegated M2M for service accounts. Policies are applied per user, group, or machine.
Users register a FIDO2-compatible device or biometric once. After that, SSH and sudo require no password — ever.
All authentications are logged with full context. Session recording captures what was run and when.
Drop-in passwordless SSH for every Linux host
AuthNull replaces SSH password prompts with cryptographic biometric authentication. No shared keys to rotate, no passwords to leak — just a tap on your enrolled device.
One module secures SSH, sudo, and local login
The AuthNull PAM module plugs into the Linux authentication stack to protect SSH sessions, sudo commands, and console logins — all from a single configuration.
Human users, service accounts, and root — all covered
AuthNull gives you a unified view of every account on your Linux fleet — human users go passwordless, service accounts use Delegated M2M, and privileged local accounts get breakglass protection.
Get in Touch
Meet with our team to explore passwordless 1FA for Linux — see how AuthNull eliminates passwords across SSH, sudo, and service accounts.