How To Secure OPNsense Firewall With 2FA (Two Factor Authentication)

How To Secure OPNsense Firewall With 2FA (Two Factor Authentication)

Enabling 2FA (Two-Factor Authentication) on OPNsense provides a significant security upgrade for accessing the firewall’s web interface (and optionally VPN, SSH, etc.). Here are the main benefits:

🔒 1. Stronger Security for Admin Access
Prevents unauthorized access even if your password is compromised.
Requires something you know (password) and something you have (like a TOTP app).

🛡️ 2. Reduces Risk of Brute-Force Attacks
Password-only systems are vulnerable to brute-force or leaked credentials.
2FA adds a second layer that automated bots or attackers can't easily bypass.

🌐 Safer Remote Management
If you're accessing OPNsense remotely (via WAN or VPN), 2FA helps protect against:
Credential stuffing
Phishing attacks
Exposed web GUI logins

✅ Supports Standard TOTP Apps
Works with apps like:
Google Authenticator
Authy
FreeOTP
KeepassXC (with TOTP plugin)

🔧 Customizable per Service
. You can enable 2FA for:
Web GUI login
VPN (like OpenVPN)
SSH access
. You can also have different 2FA configurations per user.

👥 Helps with Multi-Admin Environments
Ensures all admins use strong 2FA.
Reduces internal risks or weak credentials from other users.

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#OPNsense #2FA #authentication