[pptp-server] error 720 on client

Jeff Shanholtz jsubs at shanholtz.com
Mon Sep 24 02:52:00 CDT 2001 

My client machine is getting an error 720 after it tries to "register
computer on the network". My server is RH 7.1 (ppp 2.4.0) with poptop
1.0.1. My client is XP Pro and the vpn properties dialog is almost
identical to that of 2000. Chosen security settings: typical, require
secured password, use win logon is unchecked, and require data
encryption is unchecked. I had been connecting to the server just fine
until tonight but I don't know what has changed to make it stop working.
Any advice would be appreciated.

The most relevant pptpd.log file messages (complete set below) seem to
be:

    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Made a CALL DISCONNECT RPLY
packet
    Sep 24 00:22:03 shane pppd[1565]: LCP terminated by peer
(^UM-^J^?^D^@<M-Mt^@^@^BM-P)

Here is my config file (/etc/pptpd.conf) - comment lines stripped out:

    option /etc/ppp/options.pptp
    localip 192.168.0.244
    remoteip 192.168.0.245

Here is my ppp options file (/etc/ppp/options.pptp):

    lock
    debug
    auth
    +chap
    proxyarp

Here are the relevant lines from /var/log/pptpd.log:

    Sep 24 00:22:00 shane pptpd[1564]: MGR: Launching /usr/sbin/pptpctrl
to handle client
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: local address =
192.168.0.244
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: remote address =
192.168.0.245
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: pppd options file =
/etc/ppp/options.pptp
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Client 192.168.0.101
control connection started
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Received PPTP Control
Message (type: 1)
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Made a START CTRL CONN RPLY
packet
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: I wrote 156 bytes to the
client.
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Sent packet to client
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Received PPTP Control
Message (type: 7)
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Set parameters to 1525
maxbps, 64 window size
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Made a OUT CALL RPLY packet
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Starting call (launching
pppd, opening GRE)
    Sep 24 00:22:00 shane pptpd[1430]: MGR: No free connection slots or
IPs - no more clients can connect!
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: pty_fd = 5
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: tty_fd = 6
    Sep 24 00:22:00 shane pptpd[1565]: CTRL (PPPD Launcher): Connection
speed = 115200
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: I wrote 32 bytes to the
client.
    Sep 24 00:22:00 shane pptpd[1565]: CTRL (PPPD Launcher): local
address = 192.168.0.244
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Sent packet to client
    Sep 24 00:22:00 shane pptpd[1565]: CTRL (PPPD Launcher): remote
address = 192.168.0.245
    Sep 24 00:22:00 shane pppd[1565]: pppd 2.4.0 started by root, uid 0
    Sep 24 00:22:00 shane pppd[1565]: using channel 2
    Sep 24 00:22:00 shane pppd[1565]: Using interface ppp0
    Sep 24 00:22:00 shane pppd[1565]: Connect: ppp0 <--> /dev/pts/0
    Sep 24 00:22:00 shane pptpd[1564]: CTRL: Received PPTP Control
Message (type: 15)
    Sep 24 00:22:00 shane pppd[1565]: sent [LCP ConfReq id=0x1 <asyncmap
0x0> <auth chap MD5> <magic 0xed3d12c6> <pcomp> <accomp>]
    Sep 24 00:22:01 shane pptpd[1564]: CTRL: Got a SET LINK INFO packet
with standard ACCMs
    Sep 24 00:22:01 shane pptpd[1564]: GRE: Discarding duplicate packet
    Sep 24 00:22:01 shane pppd[1565]: rcvd [LCP ConfAck id=0x1 <asyncmap
0x0> <auth chap MD5> <magic 0xed3d12c6> <pcomp> <accomp>]
    Sep 24 00:22:02 shane pppd[1565]: rcvd [LCP ConfReq id=0x1 <mru
1400> <magic 0x158a7f04> <pcomp> <accomp> <callback CBCP>]
    Sep 24 00:22:02 shane pppd[1565]: sent [LCP ConfRej id=0x1 <callback
CBCP>]
    Sep 24 00:22:02 shane pppd[1565]: rcvd [LCP ConfReq id=0x2 <mru
1400> <magic 0x158a7f04> <pcomp> <accomp>]
    Sep 24 00:22:02 shane pppd[1565]: sent [LCP ConfAck id=0x2 <mru
1400> <magic 0x158a7f04> <pcomp> <accomp>]
    Sep 24 00:22:02 shane pppd[1565]: sent [CHAP Challenge id=0x1
<079a8f9af08220f6b57ece216d5373fbb38f7f8a39>, name = "shane"]
    Sep 24 00:22:02 shane pptpd[1564]: CTRL: Received PPTP Control
Message (type: 15)
    Sep 24 00:22:02 shane pptpd[1564]: CTRL: Ignored a SET LINK INFO
packet with real ACCMs!
    Sep 24 00:22:02 shane pppd[1565]: rcvd [LCP code=0xc id=0x3 15 8a 7f
04 4d 53 52 41 53 56 35 2e 31 30]
    Sep 24 00:22:02 shane pppd[1565]: sent [LCP CodeRej id=0x2 0c 03 00
12 15 8a 7f 04 4d 53 52 41 53 56 35 2e 31 30]
    Sep 24 00:22:02 shane pppd[1565]: rcvd [LCP code=0xc id=0x4 15 8a 7f
04 4d 53 52 41 53 2d 31 2d 4a 45 46 46]
    Sep 24 00:22:02 shane pppd[1565]: sent [LCP CodeRej id=0x3 0c 04 00
14 15 8a 7f 04 4d 53 52 41 53 2d 31 2d 4a 45 46 46]
    Sep 24 00:22:02 shane pppd[1565]: rcvd [CHAP Response id=0x1
<25debd17cb6e762dbd084ac14634b7e8>, name = "jeff"]
    Sep 24 00:22:02 shane pppd[1565]: sent [CHAP Success id=0x1 "Welcome
to shane."]
    Sep 24 00:22:02 shane pppd[1565]: sent [IPCP ConfReq id=0x1 <addr
192.168.0.244> <compress VJ 0f 01>]
    Sep 24 00:22:02 shane pptpd[1564]: CTRL: Received PPTP Control
Message (type: 15)
    Sep 24 00:22:03 shane pppd[1565]: sent [CCP ConfReq id=0x1 <deflate
15> <deflate(old#) 15> <bsd v1 15>]
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Got a SET LINK INFO packet
with standard ACCMs
    Sep 24 00:22:03 shane pppd[1565]: CHAP peer authentication succeeded
for jeff
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Received PPTP Control
Message (type: 12)
    Sep 24 00:22:03 shane pppd[1565]: rcvd [LCP TermReq id=0x5 15 8a 7f
04 00 3c cd 74 00 00 02 d0]
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Made a CALL DISCONNECT RPLY
packet
    Sep 24 00:22:03 shane pppd[1565]: LCP terminated by peer
(^UM-^J^?^D^@<M-Mt^@^@^BM-P)
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Received CALL CLR request
(closing call)
    Sep 24 00:22:03 shane pppd[1565]: sent [LCP TermAck id=0x5]
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: I wrote 148 bytes to the
client.
    Sep 24 00:22:03 shane pppd[1565]: Modem hangup
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Sent packet to client
    Sep 24 00:22:03 shane pppd[1565]: Connection terminated.
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Error with select(),
quitting
    Sep 24 00:22:03 shane pppd[1565]: Connect time 0.1 minutes.
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Client 192.168.0.101
control connection finished
    Sep 24 00:22:03 shane pppd[1565]: Sent 31 bytes, received 0 bytes.
    Sep 24 00:22:03 shane pptpd[1564]: CTRL: Exiting now
    Sep 24 00:22:03 shane pppd[1565]: Exit.
    Sep 24 00:22:03 shane pptpd[1430]: MGR: Reaped child 1564

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