One of our radius servers started acting strange and there has been no config change except that we updated the DELL hardware storage firmware of the server. MSCHAP authentication request returns Access-Accept, but the client does not get authenticated. We have two servers with similar config. Authentication request sent to the other server is OK. I ant figure out what the issue is. Extract of log below: Going to the next request Waking up in 2.1 seconds. rad_recv: Access-Request packet from host 10.255.253.2 port 35521, id=81, length=189 Cleaning up request 73 ID 81 with timestamp +270 Proxy-State = 0x00000002 User-Name = "ogec1" Framed-MTU = 1300 Calling-Station-Id = "90-a4-de-49-e0-60" Called-Station-Id = "a4-18-75-79-b0-50:eduroam" NAS-IP-Address = 10.255.252.248 NAS-Identifier = "XXX_WLC5" Service-Type = Framed-User MS-CHAP-Challenge = 0x2d710de1e7c6f6dfebb86195af7b5842 MS-CHAP2-Response = 0x0000f8bd757bd0a4523c2f2e52575cb5d549000000000000000031c8fc0bb6f978154d90d4e54bd3093e3a8f96d367dd7dde # Executing section authorize from file /etc/freeradius/sites-enabled/default +- entering group authorize {...} ++[preprocess] returns ok ++[chap] returns noop [mschap] Found MS-CHAP attributes. Setting 'Auth-Type = mschap' ++[mschap] returns ok Sending Access-Request of id 35 to 193.62.48.61 port 1812 Proxy-State = 0x00000002 User-Name = "ogec1" Framed-MTU = 1300 Calling-Station-Id = "90-a4-de-49-e0-60" Called-Station-Id = "a4-18-75-79-b0-50:eduroam" NAS-IP-Address = 10.255.252.248 NAS-Identifier = "XXX_WLC5" Service-Type = Framed-User MS-CHAP-Challenge = 0x2d710de1e7c6f6dfebb86195af7b5842 MS-CHAP2-Response = 0x0000f8bd757bd0a4523c2f2e52575cb5d549000000000000000031c8fc0bb6f978154d90d4e54bd3093e3a8f96d367dd7dde Domain-Name = "XXXX.AC.UK" Message-Authenticator = 0x00000000000000000000000000000000 Proxy-State = 0x3831 rad_recv: Access-Accept packet from host 193.62.48.61 port 1812, id=35, length=189 MS-CHAP2-Success = 0x00533d34383638323832443935343639393934463836374330323636383934463332463336374339354239 MS-MPPE-Recv-Key = 0x283d0adb1d7c75073e65a97484b6254b MS-MPPE-Send-Key = 0x3896bcce7a7467cf3bfe790c5ccc4111 MS-MPPE-Encryption-Policy = 0x00000002 MS-MPPE-Encryption-Types = 0x00000004 Proxy-State = 0x00000002 Proxy-State = 0x3831 # Executing section post-proxy from file /etc/freeradius/sites-enabled/default +- entering group post-proxy {...} [eap] No pre-existing handler found ++[eap] returns noop Found Auth-Type = MSCHAP Found Auth-Type = Accept Warning: Found 2 auth-types on request for user 'ogec1' Auth-Type = Accept, accepting the user Login OK: [ogec1] (from client bsc1 port 0 cli 90-a4-de-49-e0-60) # Executing section post-auth from file /etc/freeradius/sites-enabled/default +- entering group post-auth {...} [reply_log] expand: /usr/local/var/log/radius/radacct/%Y%m%d/reply-detail -> /usr/local/var/log/radius/radacct/20131205/reply-detail [reply_log] /usr/local/var/log/radius/radacct/%Y%m%d/reply-detail expands to /usr/local/var/log/radius/radacct/20131205/reply-detail [reply_log] expand: %{Packet-Src-IP-Address} Returned from %{home_server:ipaddr} for User %{User-Name} - %t -> 10.255.253.2 Returned from 193.62.48.61 for User ogec1 - Thu Dec$ ++[reply_log] returns ok [f_ticks] expand: %{reply:Packet-Type} -> Access-Accept [f_ticks] expand: f_ticks.%{%{reply:Packet-Type}:-format} -> f_ticks.Access-Accept [f_ticks] expand: /usr/local/var/log/radius/radacct/%Y%m%d/linelog -> /usr/local/var/log/radius/radacct/20131205/linelog [f_ticks] expand: Access accepted for %{User-Name} at %{NAS-IP-Address} received from %{Packet-Src-IP-Address} proxied to %{home_server:ipaddr} # CSI=%{Calling-Station-Id} $ ++[f_ticks] returns ok ++[exec] returns noop Sending Access-Accept of id 81 to 10.255.253.2 port 35521 MS-CHAP2-Success = 0x00533d34383638323832443935343639393934463836374330323636383934463332463336374339354239 MS-MPPE-Recv-Key = 0x283d0adb1d7c75073e65a97484b6254b MS-MPPE-Send-Key = 0x3896bcce7a7467cf3bfe790c5ccc4111 MS-MPPE-Encryption-Policy = 0x00000002 MS-MPPE-Encryption-Types = 0x00000004 Proxy-State = 0x00000002 Finished request 75. Going to the next request Waking up in 4.9 seconds. rad_recv: Access-Request packet from host 10.255.253.2 port 35521, id=81, length=192