>Ставь mpd 3.18_2 для FreeBSD 6
Поставил  
убрал из mpd.conf: set link enable chap
Теперь можно на соеденится с сервером без проблем...
И без пароля - под любым ником...
возвращаю - ошибка 691.
Радиус висит: Ready to process requests.
Все время...
Может Его не видно?
Или конфигурация не так?

Привожу лог mpd во время подключения к серву:

#mpd
...
[pptp99] using interface ng99
[pptp99:pptp99] mpd: PPTP connection from 192.168.10.97:3909
pptp0: attached to connection with 192.168.10.97:3909
[pptp0] IFACE: Open event
[pptp0] IPCP: Open event
[pptp0] IPCP: state change Initial --> Starting
[pptp0] IPCP: LayerStart
[pptp0] IPCP: Open event
[pptp0] bundle: OPEN event in state CLOSED
[pptp0] opening link "pptp0"...
[pptp0] link: OPEN event
[pptp0] LCP: Open event
[pptp0] LCP: state change Initial --> Starting
[pptp0] LCP: LayerStart
[pptp0] device: OPEN event in state DOWN
[pptp0] attaching to peer's outgoing call
[pptp0] device is now in state OPENING
[pptp0] device: UP event in state OPENING
[pptp0] device is now in state UP
[pptp0] link: UP event
[pptp0] link: origination is remote
[pptp0] LCP: Up event
[pptp0] LCP: state change Starting --> Req-Sent
[pptp0] LCP: phase shift DEAD --> ESTABLISH
[pptp0] LCP: SendConfigReq #1
ACFCOMP
PROTOCOMP
MRU 1500
MAGICNUM 3364fe68
AUTHPROTO CHAP MSOFTv2
MP MRRU 1600
MP SHORTSEQ
ENDPOINTDISC [802.1] 00 0e 2e 2f 84 68
pptp0-0: ignoring SetLinkInfo
[pptp0] LCP: rec'd Configure Request #0 link 0 (Req-Sent)
MRU 1400
MAGICNUM 2d956eef
PROTOCOMP
ACFCOMP
CALLBACK
Not supported
[pptp0] LCP: SendConfigRej #0
CALLBACK
[pptp0] LCP: rec'd Configure Request #1 link 0 (Req-Sent)
MRU 1400
MAGICNUM 2d956eef
PROTOCOMP
ACFCOMP
[pptp0] LCP: SendConfigAck #1
MRU 1400
MAGICNUM 2d956eef
PROTOCOMP
ACFCOMP
[pptp0] LCP: state change Req-Sent --> Ack-Sent
[pptp0] LCP: SendConfigReq #2
ACFCOMP
PROTOCOMP
MRU 1500
MAGICNUM 3364fe68
AUTHPROTO CHAP MSOFTv2
MP MRRU 1600
MP SHORTSEQ
ENDPOINTDISC [802.1] 00 0e 2e 2f 84 68
[pptp0] LCP: rec'd Configure Reject #2 link 0 (Ack-Sent)
MP MRRU 1600
MP SHORTSEQ
ENDPOINTDISC [802.1] 00 0e 2e 2f 84 68
[pptp0] LCP: SendConfigReq #3
ACFCOMP
PROTOCOMP
MRU 1500
MAGICNUM 3364fe68
AUTHPROTO CHAP MSOFTv2
[pptp0] LCP: rec'd Configure Ack #3 link 0 (Ack-Sent)
ACFCOMP
PROTOCOMP
MRU 1500
MAGICNUM 3364fe68
AUTHPROTO CHAP MSOFTv2
[pptp0] LCP: state change Ack-Sent --> Opened
[pptp0] LCP: phase shift ESTABLISH --> AUTHENTICATE
[pptp0] LCP: auth: peer wants nothing, I want CHAP
[pptp0] CHAP: sending CHALLENGE
[pptp0] LCP: LayerUp
pptp0-0: ignoring SetLinkInfo
[pptp0] LCP: rec'd Ident #2 link 0 (Opened)
MESG: MSRASV5.10
[pptp0] LCP: rec'd Ident #3 link 0 (Opened)
MESG: MSRAS-0-SLIB
[pptp0] CHAP: rec'd RESPONSE #1
Name: "w"
Peer name: "w"
mpd: warning: line too long, truncated
Can't get credentials for "w"
[pptp0] CHAP: sending FAILURE
[pptp0] LCP: authorization failed
[pptp0] device: CLOSE event in state UP
pptp0-0: clearing call
pptp0-0: killing channel
[pptp0] PPTP call terminated
[pptp0] IFACE: Close event
[pptp0] IPCP: Close event
[pptp0] IPCP: state change Starting --> Initial
[pptp0] IPCP: LayerFinish
[pptp0] IFACE: Close event
pptp0: closing connection with 192.168.10.97:3909
[pptp0] IFACE: Close event
[pptp0] device is now in state CLOSING
[pptp0] bundle: CLOSE event in state OPENED
[pptp0] closing link "pptp0"...
[pptp0] device: DOWN event in state CLOSING
[pptp0] device is now in state DOWN
[pptp0] link: CLOSE event
[pptp0] LCP: Close event
[pptp0] LCP: state change Opened --> Closing
[pptp0] LCP: phase shift AUTHENTICATE --> TERMINATE
[pptp0] LCP: SendTerminateReq #4
[pptp0] error writing len 8 frame to bypass: Network is down
[pptp0] LCP: LayerDown
[pptp0] device: DOWN event in state DOWN
[pptp0] device is now in state DOWN
pptp0: killing connection with 192.168.10.97:3909
[pptp0] link: DOWN event
[pptp0] LCP: Down event
[pptp0] LCP: LayerFinish
[pptp0] LCP: state change Closing --> Initial
[pptp0] LCP: phase shift TERMINATE --> DEAD
[pptp0] link: DOWN event
[pptp0] LCP: Down event
[pptp0] device: CLOSE event in state DOWN
[pptp0] device is now in state DOWN