[Fedora-users-br] VPN PPTP

Leonardo Korndorfer leokorndorfer em gmail.com
Ter Dez 5 17:14:01 UTC 2006


Pois bem...
Estou tendo um problema com um tunel pptp em um sistema embarado. Seguem
alguns pedaços de log:

Servidor:
Dec  5 09:05:48 Digistar daemon.err pppd[12475]: Received bad
configure-ack:  1a 04 78 00 18 04 78 00
Dec  5 09:05:51 Digistar daemon.debug pppd[12475]: sent [CCP ConfReq id=0x2
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:51 Digistar daemon.debug pptpd[12474]: GRE: accepting packet
#24
Dec  5 09:05:51 Digistar daemon.debug pptpd[12474]: GRE: accepting packet
#25
Dec  5 09:05:51 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfReq id=0x9
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:51 Digistar daemon.debug pppd[12475]: sent [CCP ConfAck id=0x9
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:51 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfAck id=0x2
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:51 Digistar daemon.err pppd[12475]: Received bad
configure-ack:  1a 04 78 00 18 04 78 00
Dec  5 09:05:52 Digistar syslog.info -- MARK --
Dec  5 09:05:54 Digistar daemon.debug pppd[12475]: sent [CCP ConfReq id=0x2
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:54 Digistar daemon.debug pptpd[12474]: GRE: accepting packet
#26
Dec  5 09:05:54 Digistar daemon.debug pptpd[12474]: GRE: accepting packet
#27
Dec  5 09:05:54 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfReq id=0xa
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:54 Digistar daemon.debug pppd[12475]: sent [CCP ConfAck id=0xa
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:54 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfAck id=0x2
<deflate 15> <deflate(old#) 15>]
Dec  5 09:05:54 Digistar daemon.err pppd[12475]: Received bad
configure-ack:  1a 04 78 00 18 04 78 00
Dec  5 09:05:57 Digistar daemon.warn pppd[12475]: CCP: timeout sending
Config-Requests
Dec  5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: Received PPTP
Control Message (type: 5)
Dec  5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: Made a ECHO RPLY
packet
Dec  5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: I wrote 20 bytes
to the client.
Dec  5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: Sent packet to
client
Dec  5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: Sending ECHO REQ
id 1
Dec  5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: Made a ECHO REQ
packet
Dec  5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: I wrote 16 bytes
to the client.
Dec  5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: Sent packet to
client


Cliente:
Dec  5 12:01:14 eng-4 pptp[7083]: anon log[main:pptp.c:276]: The synchronous
pptp option is NOT activated
Dec  5 12:01:14 eng-4 pptp[7086]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent
control packet type is 1 'Start-Control-Connection-Request'
Dec  5 12:01:14 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:738]:
Received Start Control Connection Reply
Dec  5 12:01:14 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:772]:
Client connection established.
Dec  5 12:01:15 eng-4 pptp[7086]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent
control packet type is 7 'Outgoing-Call-Request'
Dec  5 12:01:15 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:857]:
Received Outgoing Call Reply.
Dec  5 12:01:15 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:896]:
Outgoing call established (call ID 0, peer's call ID 1408).
Dec  5 12:01:15 eng-4 pppd[7088]: pppd 2.4.3 started by root, uid 0
Dec  5 12:01:15 eng-4 pppd[7088]: Using interface ppp0
Dec  5 12:01:15 eng-4 pppd[7088]: Connect: ppp0 <--> /dev/pts/5
Dec  5 12:01:15 eng-4 pppd[7088]: Warning - secret file /etc/ppp/pap-secrets
has world and/or group access
Dec  5 12:01:17 eng-4 pppd[7088]: Warning - secret file /etc/ppp/pap-secrets
has world and/or group access
Dec  5 12:01:17 eng-4 pppd[7088]: Remote message: Login ok
Dec  5 12:01:17 eng-4 pppd[7088]: PAP authentication succeeded
Dec  5 12:01:17 eng-4 kernel: PPP Deflate Compression module registered
Dec  5 12:01:17 eng-4 pppd[7088]: Deflate (15) compression enabled
Dec  5 12:01:17 eng-4 pppd[7088]: local  IP address 192.168.10.51
Dec  5 12:01:17 eng-4 pppd[7088]: remote IP address 192.168.10.1
Dec  5 12:01:20 eng-4 pppd[7088]: Deflate (15) compression enabled

Este é o pedaço de codigo onde o erro é gerado.
    if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len):
    (len == 0)) ){
    /* Ack is bad - ignore it */
    error("Received bad configure-ack: %P", inp, len);
    return;
    }


Eu estou com uma grande tendencia a acreditar que nao é bug no codigo. Meus
arquivos de configuraçao tambem acredito que nao tenham problemas.
Ele fica recebendo esses "bad configure-ack" desde o pacote #1.

Interessante, nao?

Se alguem tiver alguma ideia sera bem vinda.




-- 
Leonardo Korndorfer
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alt.not.root.coffe.coffe.coffe

A monk asked Joshu, "Does a dog have the Buddha nature?
Joshu retorted, "Mu!"

MSN: leokorndorfer em hotmail.com
ICQ: 102788426
Slack + Gentoo
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