[pptp-server] Out Of Order Packets (NOT GRE)

[Mark Pearson]

Any ideas on this one?  My VPN keeps kicking people off, but does not seem
to reset their packet count.  When they reconnect it thinks they have pass
higher numbered packets and refuses to operate!  This happens continually
:-(  (Windows 2000 clients)

Here is some stuff from the log i can provide further if neccessary.


Nov  9 16:52:00 vern pptpd[636]: CTRL: pppd options file =
/etc/ppp/options.pptp
Nov  9 16:52:00 vern pptpd[636]: CTRL: Client 192.168.0.123 control
connection started
Nov  9 16:52:00 vern pptpd[636]: CTRL: Received PPTP Control Message (type:
1)
Nov  9 16:52:00 vern pptpd[636]: CTRL: Made a START CTRL CONN RPLY packet
Nov  9 16:52:00 vern pptpd[636]: CTRL: I wrote 156 bytes to the client.
Nov  9 16:52:00 vern pptpd[636]: CTRL: Sent packet to client
Nov  9 16:52:00 vern pptpd[636]: CTRL: Received PPTP Control Message (type:
7)
Nov  9 16:52:00 vern pptpd[636]: CTRL: 0 min_bps, 1525 max_bps, 32 window
size
Nov  9 16:52:00 vern pptpd[636]: CTRL: Made a OUT CALL RPLY packet
Nov  9 16:52:00 vern pptpd[636]: CTRL: Starting call (launching pppd,
opening GRE)
Nov  9 16:52:00 vern pptpd[636]: CTRL: pty_fd = 5
Nov  9 16:52:00 vern pptpd[636]: CTRL: tty_fd = 6
Nov  9 16:52:00 vern pptpd[636]: CTRL: I wrote 32 bytes to the client.
Nov  9 16:52:00 vern pptpd[637]: CTRL (PPPD Launcher): Connection speed =
115200
Nov  9 16:52:00 vern pptpd[637]: CTRL (PPPD Launcher): local address =
192.168.0.124
Nov  9 16:52:00 vern pptpd[637]: CTRL (PPPD Launcher): remote address =
192.168.0.124
Nov  9 16:52:00 vern pptpd[636]: CTRL: Sent packet to client
Nov  9 16:52:00 vern pppd[637]: pppd 2.4.0 started by root, uid 0
Nov  9 16:52:00 vern pppd[637]: using channel 4
Nov  9 16:52:00 vern pppd[637]: Using interface ppp1
Nov  9 16:52:00 vern pppd[637]: Connect: ppp1 <--> /dev/pts/2
Nov  9 16:52:00 vern pppd[637]: sent [LCP ConfReq id=0x1 <mru 1450>
<asyncmap 0x0> <auth chap 81> <magic 0xe642dec6> <pcomp> <accomp>]
Nov  9 16:52:01 vern pptpd[636]: CTRL: Received PPTP Control Message (type:
15)
Nov  9 16:52:01 vern pptpd[636]: CTRL: Got a SET LINK INFO packet with
standard ACCMs
Nov  9 16:52:01 vern pptpd[590]: Discarding out-of-order packet 0, already
have 109
Nov  9 16:52:01 vern pppd[637]: rcvd [LCP ConfReq id=0x0 <magic 0x5f427d0b>
<pcomp> <accomp> <callback CBCP> <mrru 1614> <endpoint
[local:9e.9f.45.5b.aa.2b.45.f9.aa.da.f5.ac.82.a6.f6.54.00.00.00.09]>]
Nov  9 16:52:01 vern pppd[637]: sent [LCP ConfRej id=0x0 <mrru 1614>]
****Nov  9 16:52:01 vern pptpd[590]: Discarding out-of-order packet 1,
already have 109
Nov  9 16:52:01 vern pppd[637]: rcvd [LCP ConfNak id=0x1 <mru 1500>]
Nov  9 16:52:01 vern pppd[637]: sent [LCP ConfReq id=0x2 <asyncmap 0x0>
<auth chap 81> <magic 0xe642dec6> <pcomp> <accomp>]
****Nov  9 16:52:01 vern pptpd[590]: Discarding out-of-order packet 2,
already have 109
Nov  9 16:52:01 vern pppd[637]: rcvd [LCP ConfReq id=0x1 <magic 0x5f427d0b>
<pcomp> <accomp> <callback CBCP> <endpoint
[local:9e.9f.45.5b.aa.2b.45.f9.aa.da.f5.ac.82.a6.f6.54.00.00.00.09]>]
Nov  9 16:52:01 vern pppd[637]: sent [LCP ConfAck id=0x1 <magic 0x5f427d0b>
<pcomp> <accomp> <callback CBCP> <endpoint
[local:9e.9f.45.5b.aa.2b.45.f9.aa.da.f5.ac.82.a6.f6.54.00.00.00.09]>]
****Nov  9 16:52:01 vern pptpd[590]: Discarding out-of-order packet 3,
already have 109
Nov  9 16:52:01 vern pppd[637]: rcvd [LCP ConfAck id=0x2 <asyncmap 0x0>
<auth chap 81> <magic 0xe642dec6> <pcomp> <accomp>]
Nov  9 16:52:01 vern pppd[637]: sent [LCP EchoReq id=0x0 magic=0xe642dec6]
Nov  9 16:52:01 vern pppd[637]: cbcp_lowerup
Nov  9 16:52:01 vern pppd[637]: want: 2
Nov  9 16:52:01 vern pppd[637]: sent [CHAP Challenge id=0x1
<0ce3144fb61c0e4fd02c49ced4772b29>, name = "vern"]
Nov  9 16:52:01 vern pptpd[636]: CTRL: Received PPTP Control Message (type:
15)
Nov  9 16:52:01 vern pptpd[636]: CTRL: Ignored a SET LINK INFO packet with
real ACCMs!
Nov  9 16:52:01 vern pptpd[590]: Discarding out-of-order packet 4, already
have 109
Nov  9 16:52:01 vern pppd[637]: rcvd [LCP code=0xc id=0x2 5f 42 7d 0b 4d 53
52 41 53 56 35 2e 30 30]
Nov  9 16:52:01 vern pppd[637]: sent [LCP CodeRej id=0x3 0c 02 00 12 5f 42
7d 0b 4d 53 52 41 53 56 35 2e 30 30]
Nov  9 16:52:01 vern pptpd[590]: Discarding out-of-order packet 5, already
have 109
Nov  9 16:52:01 vern pppd[637]: rcvd [LCP code=0xc id=0x3 5f 42 7d 0b 4d 53
52 41 53 2d 31 2d 41 4e 44 59 5f 48]
Nov  9 16:52:01 vern pppd[637]: sent [LCP CodeRej id=0x4 0c 03 00 16 5f 42
7d 0b 4d 53 52 41 53 2d 31 2d 41 4e 44 59 5f 48]

My Options file:

debug
name XXX
mru 1450
mtu 1450
auth
ms-wins 192.168.0.124
require-chap
proxyarp
+chap
+chapms
+chapms-v2
mppe-40
mppe-128
mppe-stateless


Mark