Note: FortiGate checks against all possible authentication servers in parallel to allow the fastest possible response time and prevent undue wait times during login. There is no priority list at present (FortiOS 7.0.3) to influence in what order FortiGate checks credentials against authentication servers. This can amount to several different servers.Ĥ) FortiGate tries to authenticate the user against all possible authentication servers at once. This can cause two-factor authentication to be skipped as well.ģ) If no local user entry is found, FortiGate looks for any remote authentication servers that are included in the user groups – any LDAP or RADIUS authentication server in any user group in any SSLVPN policy. for more about local user authentication being bypassed due to a case mismatch. If a user logs in with JSmith, for example, and there is a local user entry with ‘jsmith’, it will NOT match. When a user tries to connect and supplies appropriate credentials (username and password or certificate), the following occurs:ġ) FortiGate checks all SSL VPN policies and compiles a list of users and user groups.Ģ) FortiGate checks if the user trying to log in matches a local user entry that is outright referenced in the SSLVPN policies, OR included explicitly in one of the user groups. In larger environments, SSL VPN setups can grow to be complex, including different user groups with the different portals in the SSL VPN settings, and many different policies for SSL VPN.Īt this point, with multiple groups in use, the way FortiGate authenticates SSL VPN users can be a bit difficult to understand intuitively. An SSL VPN policy exists (a policy with the SSL VPN tunnel interface as source interface) this will require a user or group to be included in the source options A default portal is configured (under 'All other users/groups' in the SSL VPN settings) SSLVPN is set to listen on at least one interface This requires the following configuration: This article describes a basic understanding of how FortiGate SSL VPN authentication works how FortiGate determines what groups to check a user against, and common issues and misunderstandings about the process.įortiGate includes the option to set up an SSL VPN server to allow client machines to connect securely and access resources through the FortiGate.
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