Remote Access VPN with Two-Factor Authentication
If you configure a GlobalProtect portal or gateway with an authentication profile and a certificate profile (which together can provide two-factor authentication), the end user must succeed at authentication through both profiles before gaining access. For portal authentication, this means that certificates must be pre-deployed to the end clients before their initial portal connection. Additionally, the client certificate presented by a client must match what is defined in the certificate profile.
- If the certificate profile does not specify a username field (that is, theUsername Fieldit is set toNone), the client certificate does not need to have a username. In this case, the client must provide the username when authenticating against the authentication profile.
- If the certificate profile specifies a username field, the certificate that the client presents must contain a username in the corresponding field. For example, if the certificate profile specifies that the username field is Subject, the certificate presented by the client must contain a value in the common-name field, or else the authentication fails. In addition, when the username field is required, the value from the username field of the certificate is automatically populated as the username when the user attempts to enter credentials for authenticating to the authentication profile. If you do not want force users to authenticate with a username from the certificate, do not specify a username field in the certificate profile.
This quick configuration uses the same topology as Figure: GlobalProtect VPN for Remote Access. However, in this configuration the clients must authenticate against a certificate profile and an authentication profile. For more details on a specific type of two-factor authentication, see the following topics:
Use the following procedure to configure VPN Remote Access with Two-Factor Authentication.
- Use thedefaultvirtual router for all interface configurations to avoid having to create inter-zone routing.
- Selectand configure ethernet1/2 as a Layer 3 Ethernet interface with IP addressNetworkInterfacesEthernet203.0.113.1and assign it to the l3-untrust security zone and the default virtual router.
- Create a DNS “A” record that maps IP address203.0.113.1togp.acme.com.
- Selectand add theNetworkInterfacesTunneltunnel.2interface and add it to a new zone calledcorp-vpn. Assign it to the default virtual router.
- Enable User Identification on the corp-vpn zone.
- Create security policy to enable traffic flow between the corp-vpn zone and the l3-trust zone to enable access to your internal resources.
- Selectand then clickPoliciesSecurityAddto add a new rule.
- For this example, you would define the rule with the following settings:
- Name—VPN Access
- Source Zone—corp-vpn
- Destination Zone—l3-trust
- Obtain a server certificate for the interface hosting the GlobalProtect portal and gateway using one of the following methods:Selectto manage certificates as follows:DeviceCertificate ManagementCertificates
- Obtain a server certificate. Because the portal and gateway are on the same interface, the same server certificate can be used for both components.
- The CN of the certificate must match the FQDN,gp.acme.com.
- To enable clients to connect to the portal without receiving certificate errors, use a server certificate from a public CA.
- Use your enterprise PKI or a public CA to issue a unique client certificate to each GlobalProtect user.
- Select,DeviceCertificate ManagementCertificate ProfileAddand enter a profileNamesuch asGP-client-cert.
- Specify where to get the username that will be used to authenticate the end user:
- From user—If you want the end user to supply a username when authenticating to the service specified in the authentication profile, selectNoneas theUsername Field.
- From certificate—If you want to extract the username from the certificate, selectSubjectas theUsername Field. If you use this option, the CN contained in the certificate will automatically populated the username field when the user is prompted to login to the portal/gateway and the user will be required to log in using that username.
- In the CA Certificates section,Addand then select theCA Certificatethat issued the client certificates, and clickOKtwice.
- The server profile instructs the firewall how to connect to the authentication service. Local, RADIUS, Kerberos, and LDAP authentication methods are supported. This example shows an LDAP authentication profile for authenticating users against the Active Directory.Create the server profile for connecting to the LDAP server ().DeviceServer ProfilesLDAP
- Attach the server profile to an authentication profile ().DeviceAuthentication Profile
- See the topology diagram shown in Figure: GlobalProtect VPN for Remote Access.Selectand add the following configuration:NetworkGlobalProtectGatewaysInterface—ethernet1/2IP Address—203.0.113.1Server Certificate—GP-server-cert.pem issued by GoDaddyCertificate Profile—GP-client-certAuthentication Profile—Corp-LDAPTunnel Interface—tunnel.2IP Pool—10.31.32.3 - 10.31.32.118
- Selectand add the following configuration:NetworkGlobalProtectPortals
- Interface—ethernet1/2IP Address—203.0.113.1Server Certificate—GP-server-cert.pem issued by GoDaddyCertificate Profile—GP-client-certAuthentication Profile—Corp-LDAP
- Connect Method—On-demand(Manual user initiated connection)External Gateway Address—gp.acme.com
- (Optional) Deploy Agent Settings Transparently.As an alternative to deploying agent settings from the portal configuration, you can define settings directly from the Windows registry or global MAC plist. Examples of settings that you can deploy include specifying the portal IP address or enabling GlobalProtect to initiate a VPN tunnel before a user logs in to the device and connects to the GlobalProtect portal. On Windows clients only, you can also configure settings using the MSIEXEC installer. For additional information, see Customizable Agent Settings.
- (Optional) Enable use of the GlobalProtect mobile app.Purchase and install a GlobalProtect Gateway subscription () to enable use of the app.DeviceLicenses
- Save the GlobalProtect configuration.ClickCommit.
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