[pptp-server] pptpd control errors ... loops

[Brian L. DiMambro]

Hi all.

Found my VPN system with a load of 1.73 and syslogd @ 88%. Looked @ the
logs and found that pptpd was having a problem on it's control channel.
This has happened twice in the past 2 weeks. There were 2 other
connections up when this error occured. We just installed a Cisco PIX
firewall and I set up a conduit for protocol 47 for all ports plus we
are doing NAT translation through the PIX. I also setup a conduit for
port 1723 to handle the rest of pptpd. I don't know if the PIX has
anything to do with this .... but it was very stable prior to installing
it. IF not, then any ideas why I'm getting this error. Totaly looped
pptpd.

I'm running RH6.1 with the 2.2.14 kernel from kernel.org. I installed
pptpd-1.0.0-1 and ppp-2.3.8-1 with the ppp-2.3.8-patch1 and
ppp-2.3.8-mppe-others-norc4_TH7.diff and mppe_stateless.diff.

following is my options file:

lock
# debug
auth
+chap
proxyarp
ms-dns 192.168.20.245 # Maybe now auto dns
+chapms
+chapms-v2
mppe-40
mppe-128
mppe-stateless

Here is the syslog output (a very small part) just prior to the loop.

May 17 17:08:43 wclvs2 xntpd[1988]: synchronized to 63.192.96.2,
stratum=2
May 17 17:15:30 wclvs2 xntpd[1988]: synchronized to 192.220.202.75,
stratum=2
May 17 17:20:25 wclvs2 pptpd[4706]: CTRL: Session timed out, ending call

May 17 17:20:25 wclvs2 pptpd[4706]: CTRL: Client 24.19.214.220 control
connection finished
May 17 17:20:25 wclvs2 pppd[4707]: Modem hangup
May 17 17:20:25 wclvs2 pppd[4707]: Connection terminated.
May 17 17:20:26 wclvs2 pppd[4707]: Connect time 1109.3 minutes.
May 17 17:20:26 wclvs2 pppd[4707]: Sent 1130117 bytes, received 561351
bytes.
May 17 17:20:26 wclvs2 pppd[4707]: Exit.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: Unexpected control message 0
in disconnect sequence
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: Unexpected control message 0
in disconnect sequence
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: Unexpected control message 0
in disconnect sequence
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: Unexpected control message 0
in disconnect sequence
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: Unexpected control message 0
in disconnect sequence
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: Unexpected control message 0
in disconnect sequence
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: EOF or bad error reading ctrl
packet length.
May 17 17:20:26 wclvs2 pptpd[4706]: CTRL: couldn't read packet header
(exit)

Thanks in advance for your help.

Brian
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