Technical Tip: Password change for SSL VPN local users on FortiAuthenticator.

[rbraha]

Description	This article describes how to reset local users' password that resides on FortiAuthenticator database.
Scope	FortiGate, FortiAuthenticator.
Solution	Let's presume that SSL VPN authentication is configured between FortiGate and FortiAuthenticator. The configuration part is described in the below documentation. Technical Tip: Guide to setting up FortiGate SSL-VPN with RADIUS authentication, remote LDAP tie-in ... In this case, local user groups on FortiAuthenticator is used instead of remote ldap users. When creating a local user there is an option on FortiAuthenticator to 'Force change password on next logon'. In order to be able to reset on the FortiGate side as Authentication Method should be used MS-CHAP-v2, using PAP will not be triggered to change the password on the next logon. This is tested from Webmode of the SSL VPN link on FortiGate. It is possible to run the debug logs on the FortiGate CLI side : diag debug application fnbamd -1 diag debug application sslvpn -1 diag debug enable  [191:root:f9]sslvpn_authenticate_user:191 authenticate user: [genci] [191:root:f9]sslvpn_authenticate_user:205 create fam state [191:root:f9][fam_auth_send_req_internal:426] Groups sent to FNBAM: [191:root:f9]group_desc[0].grpname = genci root:f9]fam_auth_send_req:1007 task finished with 4 [570] __fnbamd_cfg_get_radius_list_by_group-Loading RADIUS server 'FAC' for usergroup 'genci' (4) sent radius req to server 'FAC': fd=12, IP=x.x.x.x:1812) code=1 id=31 len=185 user="genci" using MS-CHAPv2 fnbamd_radius_auth_validate_pkt-RADIUS resp code 3 [424] extract_chap_error-CHAP err: E=648 R=0 C=0cf6fd4d20b660f535dcb65716d4c8fa V=3 M=Password Expired auth_proc_resp:1359 fnbam_auth_update_result return: 2 (challenged)   <-- challenged means that password was expired. nbamd_radius_auth_validate_pkt-RADIUS resp code 2  <-- an access-accept has been grant. [323] extract_success_vsas-FORTINET attr, type 1, val sales  fnbamd_auth_handle_radius_result-->Result for radius svr 'FAC' 10.191.21.11(1) is 0 [1607] fnbam_user_auth_group_match-req id: 1831613320, server: FAC, local auth: 0, dn match: 0 [1576] __group_match-Group 'genci' passed group matching ---- group matched  fam_auth_proc_resp:1359 fnbam_auth_update_result return: 0 (success) :root:fb]fam_do_cb:667 fnbamd return auth success.  <-- authentication success.