[pptp-server] MS Client Error 645

[Alex Stagg]

I'm just working on getting pptp running on our LInux firewall. I'm able to
successfully connect from the (ethernet) network outside our firewall.
But when I try to do the same from a dialup (via two ISPs), the MS client
reports "Error 645: The Microsoft Dial-Up Adapter is in use or not
responding
properly. Disconnect other connections and then try again."

On the firewall/pptp server I see in the logs (for the failure):
Mar  3 13:11:46 leon pptpd[9435]: CTRL: Client 209.234.65.40 control
connection
started
Mar  3 13:11:47 leon pptpd[9435]: CTRL: Starting call (launching pppd,
opening G
RE)
Mar  3 13:11:47 leon pppd[9436]: pppd 2.3.8 started by root, uid 0
Mar  3 13:11:47 leon pppd[9436]: Using interface ppp0
Mar  3 13:11:47 leon pppd[9436]: Connect: ppp0 <--> /dev/ttyp0
Mar  3 13:11:47 leon pppd[9436]: sent [LCP ConfReq id=0x1 <asyncmap 0x0>
<auth c
hap 81> <magic 0xbcabdba> <pcomp> <accomp>]
Mar  3 13:11:49 leon pptpd[9435]: CTRL: Error with select(), quitting
Mar  3 13:11:49 leon pptpd[9435]: CTRL: Client 209.234.65.40 control
connection
finished
Mar  3 13:11:49 leon pppd[9436]: Modem hangup
Mar  3 13:11:49 leon pppd[9436]: Connection terminated.
Mar  3 13:11:49 leon pppd[9436]: Exit.

I've tried looking back in the June/July 99 archives, and tried some of the
things without success.

On the firewall, I'm running 2.0.36, ppp 2.3.8, pptpd 0.9.17.
On the client, its W98. Don't know about the DUN level - I may have
a tried installing a new one (dun40.exe) about a year ago.

Any idea if this is a client or server problem, or if it happens if GRE is
being blocked? How can I check if GRE is being blocked or not (or do
the log entries above prove it's not)?

Alex Stagg
SoftProse, Inc.
1776 22nd Street, Suite 100, West Des Moines, IA 50266
Direct: 515-988-4291, Main: 515-221-2220, Fax: 435-514-0727
email: alex at SoftProseInc.com
URL: http://www.softproseinc.com

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