Advanced VPN and Zero Trust →mediumMultiple ChoiceObjective-mapped

NSE7 Advanced VPN and Zero Trust Practice Question

Exhibit

Refer to the exhibit.

FGT # diagnose vpn ssl stats
SSL VPN statistics:
  Total tunnels: 0
  Active tunnels: 0
  Authenticated users: 0
  Login failures: 15
  Last failure reason: auth_fail

FGT # diagnose debug authd fsso list
No FSSO configured.

FGT # show full-configuration | grep ssl
config vpn ssl settings
    set servercert "self-sign"
    set port 443
    set source-interface "wan1"
    set source-address "all"
    set algorithm low
    set login-attempt-limit 3
    set login-block-time 60
end

config user local
    edit "user1"
        set type password
        set passwd ENC SHAtmpEncryptedPasswordHash
    next
end

config user group
    edit "ssl_vpn_group"
        set member "user1"
    next
end

Refer to the exhibit. Users report that they cannot log in to the SSL VPN portal. The stats show 15 login failures with reason 'auth_fail'. What is the most likely cause?

⚠ Common exam trap

Test-takers frequently assume 'auth_fail' always means a wrong password or missing user, but Fortinet specifically uses 'auth_fail' to indicate a group mismatch when the user exists and the password is correct, testing your understanding of SSL VPN portal-to-group binding.

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The SSL VPN settings do not reference the user group

The 'auth_fail' reason indicates that the authentication request was processed but rejected, typically because the SSL VPN portal is not configured to reference the user group that 'user1' belongs to. Without a group filter or group mapping in the SSL VPN settings, the FortiGate cannot match the user to any allowed group, causing the authentication to fail even if the user credentials are valid.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
The user 'user1' does not exist
Why it's wrong here
The user is configured locally.
✗
The login-attempt-limit is too low
Why it's wrong here
The limit is 3 but that would only block after 3 failures; the total 15 failures could be from multiple users or after block expires. This is not the root cause.
✗
The encryption algorithm is set to low
Why it's wrong here
Low algorithm may be weak but does not cause auth_fail.
✓
The SSL VPN settings do not reference the user group
Why this is correct
The configuration is missing 'set user-group' under config vpn ssl settings; thus no group is authorized for login, causing authentication failure.

Quick reference

VPN Protocol Comparison

Protocol	Port	Encryption	Authentication	Use Case
IKEv2 / IPsec	UDP 500 / 4500	AES-256	Certificates / PSK	Site-to-site & remote access
SSL / TLS VPN	TCP 443	TLS 1.3	Certificates / MFA	Clientless remote access
L2TP / IPsec	UDP 1701	AES (IPsec)	PSK / Certificates	Legacy remote access
WireGuard	UDP 51820	ChaCha20	Public keys	Modern high-performance VPN
PPTP	TCP 1723	MPPE (weak)	MS-CHAPv2	Legacy — avoid in production

PPTP is considered insecure. IKEv2/IPsec and SSL VPN are the current recommended options.

Go deeper

NSE7 Advanced VPN and Zero Trust Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

VPN Protocol Comparison

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