SAML SP for VPN authentication

When you configure a FortiGate as a service provider (SP), you can create an authentication profile that uses SAML for both firewall and SSL VPN web portal authentication. Once the firewall is authenticated, entering SAML credentials is not required for SSL VPN web portal authentication.

You must use the identity provider's (IdP) remote certificate on the SPs.

The following example uses a FortiGate as an SP and FortiAuthenticator as the IdP server:

To configure firewall authentication:

1. Configure the FortiGate SP to be a SAML user:

   config user saml
       edit "fac-firewall"
           set entity-id "http://10.2.2.2:1000/saml/metadata/"
           set single-sign-on-url "https://10.2.2.2:1003/saml/login/"
           set single-logout-url "https://10.2.2.2:1003/saml/logout/"
           set idp-entity-id "http://172.18.58.93:443/saml-idp/bbbbbb/metadata/"
           set idp-single-sign-on-url "https://172.18.58.93:443/saml-idp/bbbbbb/login/"
           set idp-single-logout-url "https://172.18.58.93:443/saml-idp/bbbbbb/logout/"
           set idp-cert "REMOTE_Cert_3"
           set user-name "username"
           set group-name "group"
       next
   end

2. Add the SAML user to the user group (optionally, you can configure group matching):

   config user group
       edit "saml_firewall"
           set member "fac-firewall"
           config match
               edit 1
                   set server-name "fac-firewall"
                   set group-name "user_group1"
               next
           end
       next
   end

3. Add the SAML user group to a firewall policy:

   config firewall policy
       edit 2
           set srcintf "port3"
           set dstintf "port1"
           set srcaddr "all"
           set dstaddr "pc4"
           set action accept
           set schedule "always"
           set service "ALL"
           set logtraffic all
           set fsso disable
           set groups "saml_firewall" "group_local"
           set users "first"
           set nat enable
       next
   end

4. Configure the FortiAuthenticator IdP as needed.
5. Run HTTP/HTTPS authentication for a remote user. The SAML login page appears:

   

To configure SSL VPN web portal authentication:

1. Configure the FortiGate SP to be a SAML user:

   config user saml
       edit "fac-sslvpn"
           set entity-id "https://10.2.2.2:10443/remote/saml/metadata/"
           set single-sign-on-url "https://10.2.2.2:10443/remote/saml/login/"
           set single-logout-url "https://10.2.2.2:10443/remote/saml/logout/"
           set idp-entity-id "http://172.18.58.93:443/saml-idp/ssssss/metadata/"
           set idp-single-sign-on-url "https://172.18.58.93:443/saml-idp/ssssss/login/"
           set idp-single-logout-url "https://172.18.58.93:443/saml-idp/ssssss/logout/"
           set idp-cert "REMOTE_Cert_3"
           set user-name "username"
       next
   end

2. Add the SAML user to the user group (group matching may also be configured):

   config user group
       edit "saml_sslvpn"
           set member "fac-sslvpn"
       next
   end

3. Configure SSL VPN:

   config vpn ssl settings
       set servercert "Fortinet_Factory"
       set tunnel-ip-pools "SSLVPN_TUNNEL_ADDR1"
       set tunnel-ipv6-pools "SSLVPN_TUNNEL_IPv6_ADDR1"
       set source-interface "port3"
       set source-address "all"
       set source-address6 "all"
       set default-portal "full-access"
       config authentication-rule
           edit 1
               set groups "saml_sslvpn"
               set portal "web-access"
           next
       end
   end

4. Add the SAML user group to a firewall policy:

   config firewall policy
       edit 8
           set srcintf "ssl.vdom1"
           set dstintf "port1"
           set srcaddr "all"
           set dstaddr "all"
           set action accept
           set schedule "always"
           set service "ALL"
           set groups "local" "saml_sslvpn"
           set nat enable
       next
   end

5. Configure the FortiAuthenticator IdP as needed.
6. Run SSL VPN web mode authentication for a remote user. The SAML login page appears: