[pptp-server] Windows Client Connection Problems

Tony Click, Senior Principal tclick at thegallerygroup.com
Thu Jan 20 16:46:56 CST 2000 

Ok, well I've tried it both with CHAP and PAP and it still doesn't solve the
problem.  I'm convinced is on the client end.  In several places I've read
that you must first use DUN to make a connection to your ISP and then use
DUN to connect to the VPN.  In several cases I cannot use DUN to make a
connection to an ISP.

When I do a dial up connection, everything works fine.  However, when I've
not connected to an ISP via DUN but rather a LAN I get all those problems
when I try to make the VPN connection.  It was working at one point and I
cannot tell what has changed.  Is there anyone out there that has the
following configuration working?

[Win 98
Client]----ethernet----[Router]----ISDN----[ISP]====internet====[Router]----
ethernet----[pptp server]

Everything works great when I have the machine connected like:

[Win 98
Client]----Modem----[ISP]====internet====[Router]----ethernet----[pptp
server]


  -----Original Message-----
  From: karunendra [mailto:babu at rampnet.com]
  Sent: Wednesday, January 19, 2000 1:12 AM
  To: tclick at thegallerygroup.com
  Subject: Re: [pptp-server] Windows Client Connection Problems


  Hi Tony,
                  The authentication you are trying is from modem which is
sending for
  CHAP so use PAP. with your server and let me know.

  thanks
  karunnedra





    Well here are the traces - this trace is from the machine that gives the
Error: 650Jan 18 21:19:44 server pptpd[26646]: MGR: Manager process
startedJan 18 21:19:59 server pptpd[26651]: CTRL: Client 209.42.199.180
control connection startedJan 18 21:19:59 server pptpd[26651]: CTRL:
Starting call (launching pppd, opening GRE)Jan 18 21:20:00 server
pppd[26652]: pppd 2.3.8 started by root, uid 0Jan 18 21:20:00 server
pppd[26652]: Using interface ppp0Jan 18 21:20:00 server pppd[26652]:
Connect: ppp0 <--> /dev/ttyp2Jan 18 21:20:00 server pppd[26652]: sent [LCP
ConfReq id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x7e970717> <pcomp>
<accomp>]Jan 18 21:20:00 server pppd[26652]: rcvd [LCP ConfReq id=0x1 <magic
0x19ba22> <pcomp> <accomp>]Jan 18 21:20:00 server pppd[26652]: sent [LCP
ConfAck id=0x1 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:03 server
pppd[26652]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap 81> <magic
0x7e970717> <pcomp> <accomp>]Jan 18 21:20:03 server pppd[26652]: rcvd [LCP
ConfReq id=0x2 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:03 server
pppd[26652]: sent [LCP ConfAck id=0x2 <magic 0x19ba22> <pcomp> <accomp>]Jan
18 21:20:06 server pppd[26652]: sent [LCP ConfReq id=0x1 <asyncmap 0x0>
<auth chap 81> <magic 0x7e970717> <pcomp> <accomp>]Jan 18 21:20:06 server
pppd[26652]: rcvd [LCP ConfReq id=0x3 <magic 0x19ba22> <pcomp> <accomp>]Jan
18 21:20:06 server pppd[26652]: sent [LCP ConfAck id=0x3 <magic 0x19ba22>
<pcomp> <accomp>]Jan 18 21:20:09 server pppd[26652]: sent [LCP ConfReq
id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x7e970717> <pcomp> <accomp>]Jan
18 21:20:09 server pppd[26652]: rcvd [LCP ConfReq id=0x4 <magic 0x19ba22>
<pcomp> <accomp>]Jan 18 21:20:09 server pppd[26652]: sent [LCP ConfAck
id=0x4 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:12 server pppd[26652]:
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x7e970717>
<pcomp> <accomp>]Jan 18 21:20:12 server pppd[26652]: rcvd [LCP ConfReq
id=0x5 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:12 server pppd[26652]:
sent [LCP ConfAck id=0x5 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:15
server pppd[26652]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap 81>
<magic 0x7e970717> <pcomp> <accomp>]Jan 18 21:20:15 server pppd[26652]: rcvd
[LCP ConfReq id=0x6 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:15 server
pppd[26652]: sent [LCP ConfAck id=0x6 <magic 0x19ba22> <pcomp> <accomp>]Jan
18 21:20:18 server pppd[26652]: sent [LCP ConfReq id=0x1 <asyncmap 0x0>
<auth chap 81> <magic 0x7e970717> <pcomp> <accomp>]Jan 18 21:20:18 server
pppd[26652]: rcvd [LCP ConfReq id=0x7 <magic 0x19ba22> <pcomp> <accomp>]Jan
18 21:20:18 server pppd[26652]: sent [LCP ConfAck id=0x7 <magic 0x19ba22>
<pcomp> <accomp>]Jan 18 21:20:21 server pppd[26652]: sent [LCP ConfReq
id=0x1 <asyncmap 0x0> <auth chap 81> <magic 0x7e970717> <pcomp> <accomp>]Jan
18 21:20:21 server pppd[26652]: rcvd [LCP ConfReq id=0x8 <magic 0x19ba22>
<pcomp> <accomp>]Jan 18 21:20:21 server pppd[26652]: sent [LCP ConfAck
id=0x8 <magic 0x19ba22> <pcomp> <accomp>]Jan 18 21:20:22 server pppd[26652]:
rcvd [LCP TermReq id=0x9]Jan 18 21:20:22 server pppd[26652]: sent [LCP
TermAck id=0x9]Jan 18 21:20:22 server pptpd[26651]: CTRL: Error with
select(), quittingJan 18 21:20:22 server pptpd[26651]: CTRL: Client
209.42.199.180 control connection finishedJan 18 21:20:22 server
pppd[26652]: Modem hangupJan 18 21:20:22 server pppd[26652]: Connection
terminated.Jan 18 21:20:22 server pppd[26652]: Exit -----Original
Message-----
    From: karunendra [mailto:babu at rampnet.com]
    Sent: Tuesday, January 18, 2000 11:24 PM
    To: tclick at thegallerygroup.com
    Subject: Re: [pptp-server] Windows Client Connection Problems


      Hi,
           can you send me the traces.

      Thanks
      karunendra

      "Tony Click, Senior Principal" wrote:

        I've been working at this problem hot and heavy for a while now and
haven't found the appropriate incantation of animal to sacrifice to the gods
of software compatibility.  Anyone know how to fix this?I've got laptops
that can dial into the ISP and then connect to the VPN flawlessly.
Everything has went as expected.However, there are occasions that we will
have our laptops on an Ethernet network and I'd like to to be able to use
PPTP from that network to our VPN.  The current situation is we have LANs at
remote locations that have a dedicated router (ISDN) connecting them to the
internet.  On occasion, someone may need to connect to the VPN to get
files.At one point I had one machine working under this configuration, but
something happened and now it will connect only if I use DUN for internet
connectivity.  When using the Ethernet, on one machine I get error 650 and
on another 629.  Ironically both configurations appear to be identical.I can
post the logs if they're needed.  The gist of what they are indicating is
that when using an ISP, everything is kosher, but when using Ethernet, the
connection appears to try to negotiate IPXCP and NBFCP and after a bit it
just craps out.TIA-Tony
------------------------------------------------------------------------

        312 West Millbrook Road, Suite 237
        Raleigh, NC  27609
        919 844-3735  844-2926 fax
        SOFTWARE SOLUTIONS GROUP
------------------------------------------------------------------------

        Tony Click
        Senior Principal
        tclick at thegallerygroup.com
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