PPTPD VPN server terminating when registering your computer on the network

rviola81_at_hotmail.com
Date: 05/31/05


Date: 30 May 2005 17:56:11 -0700

Hello - I am fairly new to the linux world, and I have started to enjoy
working with it much more. I am tryin to set up a VPN server on my
internal home network, and I am having some problems connecting. I am
trying to connect from an internal computer, in order to start the
trouble shooting, so no routing or port forwarding is not net needed (i
would assume).

-My internal network is 192.168.1.*
-Linux server (redhat 9.0 - shrike) is 192.168.l.20 - Components
installed:
     -Upgraded PPP to: ppp-2.4.3-5.fc1.i386.rpm
     -Installed pptpd-1.2.1-1.i386.rpm

Configuration files look as follows:

IFConfig Looks as followed:

eth0 Link encap:Ethernet HWaddr 00:B0:D0:60:5F:06
          inet addr:192.168.1.20 Bcast:192.168.1.255
Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:200 errors:0 dropped:0 overruns:0 frame:0
          TX packets:157 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:21421 (20.9 Kb) TX bytes:20824 (20.3 Kb)
          Interrupt:5 Base address:0xec00

lo Link encap:Local Loopback
          inet addr:127.0.0.1 Mask:255.0.0.0
          UP LOOPBACK RUNNING MTU:16436 Metric:1
          RX packets:10 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:700 (700.0 b) TX bytes:700 (700.0 b)

/etc/pptpd.conf:

localip 192.168.2.7
remoteip 192.168.2.100-253
listen 192.168.1.20
option /etc/ppp/options.pptpd
debug
logwtmp

/etc/ppp/options.pptpd:

name vpn
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
ms-dns 204.127.*.* (these are not start in the actual file)
ms-dns 216.148.*.*
ms-dns 192.168.1.2
proxyarp
lock
nobsdcomp

/etc/ppp/chap-secrets:

user vpn tttteeeessssttt1111 192.168.2.190

I am using windows xp, and 2000 clients to connect to the vpn.

The client install is the default settings when creating a vpn client
on MS platforms through add new network connection.

Errors received on the client machine are usually "Error 737", "Error
734", or "Error 733"...

Error logging for the session connection (tail -f /var/log/messages):

May 30 20:49:42 linux1 pptpd[1832]: CTRL: Client 192.168.1.4 control
connection started
May 30 20:49:42 linux1 pptpd[1832]: CTRL: Starting call (launching
pppd, opening GRE)
May 30 20:49:42 linux1 pppd[1833]: Plugin
/usr/lib/pptpd/pptpd-logwtmp.so loaded.
May 30 20:49:42 linux1 pptpd[1832]: GRE: Bad checksum from pppd.
May 30 20:49:42 linux1 kernel: application bug: pppd(1833) has SIGCHLD
set to SIG_IGN but calls wait().
May 30 20:49:42 linux1 kernel: (see the NOTES section of 'man 2 wait').
Workaround activated.
May 30 20:49:42 linux1 kernel: CSLIP: code copyright 1989 Regents of
the University of California
May 30 20:49:42 linux1 pptpd[1832]: GRE: Received too short packet from
pppd.
May 30 20:49:42 linux1 kernel: PPP generic driver version 2.4.2
May 30 20:49:42 linux1 pppd[1833]: pppd 2.4.3 started by root, uid 0
May 30 20:49:42 linux1 pppd[1833]: Using interface ppp0
May 30 20:49:42 linux1 pppd[1833]: Connect: ppp0 <--> /dev/pts/1
May 30 20:49:42 linux1 /etc/hotplug/net.agent: assuming ppp0 is already
up
May 30 20:49:44 linux1 pppd[1833]: Modem hangup
May 30 20:49:44 linux1 pppd[1833]: Connection terminated.
May 30 20:49:44 linux1 pppd[1833]: Exit.
May 30 20:49:44 linux1 pptpd[1832]: CTRL: Client 192.168.1.4 control
connection finished
May 30 20:49:44 linux1 /etc/hotplug/net.agent: NET unregister event not
supported

Any Pointers on things I should look at would be helpful to a poor,
measly linux newbie :-)

Thanking anyone in advance!

-Rich Viola



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