Hi, we have a strange behaviour in our FreeRADIUS setup. the mschap module in one server authenticates the users and in the other server rejects him. Any ideas from you? Working server: (543) Thu Feb 20 15:49:18 2025: Debug: eap: Peer sent packet with method EAP MSCHAPv2 (26) (543) Thu Feb 20 15:49:18 2025: Debug: eap: Calling submodule eap_mschapv2 to process data (543) Thu Feb 20 15:49:18 2025: Debug: eap: Sending EAP Success (code 3) ID 108 length 4 (543) Thu Feb 20 15:49:18 2025: Debug: eap: Freeing handler (543) Thu Feb 20 15:49:18 2025: Debug: modsingle[authenticate]: returned from eap (rlm_eap) (543) Thu Feb 20 15:49:18 2025: Debug: [eap] = ok (543) Thu Feb 20 15:49:18 2025: Debug: } # authenticate = ok Failed request: (4) Fri Feb 21 13:28:09 2025: Debug: eap: Peer sent packet with method EAP MSCHAPv2 (26) (4) Fri Feb 21 13:28:09 2025: Debug: eap: Calling submodule eap_mschapv2 to process data (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: # Executing group from file /etc/freeradius/3.0/sites-enabled/vpn-ip (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: authenticate { (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: modsingle[authenticate]: calling mschap (rlm_mschap) (4) Fri Feb 21 13:28:09 2025: Debug: mschap: Found NT-Password (4) Fri Feb 21 13:28:09 2025: Debug: mschap: Creating challenge hash with username: bad_user (4) Fri Feb 21 13:28:09 2025: Debug: mschap: Client is using MS-CHAPv2 (4) Fri Feb 21 13:28:09 2025: Debug: mschap: EXPAND TMPL XLAT (4) Fri Feb 21 13:28:09 2025: Debug: mschap: EXPAND %{mschap:User-Name} (4) Fri Feb 21 13:28:09 2025: Debug: mschap: --> bad_user (4) Fri Feb 21 13:28:09 2025: Debug: mschap: EXPAND TMPL LITERAL (4) Fri Feb 21 13:28:09 2025: Debug: mschap: sending authentication request user='bad_user' domain='DOMAIN' (4) Fri Feb 21 13:28:09 2025: ERROR: mschap: When trying to update a password, this return status indicates that the value provided as the current password is not correct. [0xC000006A] (4) Fri Feb 21 13:28:09 2025: ERROR: mschap: MS-CHAP2-Response is incorrect (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: modsingle[authenticate]: returned from mschap (rlm_mschap) (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: [mschap] = reject (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: } # authenticate = reject (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: MSCHAP-Error: E=691 R=1 C=XXXX V=3 M=Authentication rejected (4) Fri Feb 21 13:28:09 2025: Debug: eap_mschapv2: Found new challenge from MS-CHAP-Error: err=691 retry=1 challenge=XXXX (4) Fri Feb 21 13:28:09 2025: ERROR: eap_mschapv2: MSCHAP Failure