[pptp-server] Unreliable poptop continues :-(

Wed Dec 20 09:28:34 CST 2000

Guys,  this is really starting to get to me.  I have a poptop server running
here at work which USED to work just fine for half a year, and recently,
since a rebuild, is flaky.

Just this morning, within the span of 2 minutes, two different clients tried
to access it.  One worked, and one failed.  And the one that failed DID work
yesterday!

Here's the logs for my successful attempt about 5 minutes ago.  Please note
the 3rd line:
-------------------------------
Dec 20 11:14:04 BNYATALIE pptpd[1476]: CTRL: Client 24.163.35.141 control
connection started
Dec 20 11:14:04 BNYATALIE pptpd[1476]: CTRL: Starting call (launching pppd,
opening GRE)
Dec 20 11:14:04 BNYATALIE kernel: CSLIP: code copyright 1989 Regents of the
University of California
Dec 20 11:14:04 BNYATALIE kernel: PPP: version 2.3.7 (demand dialling)
Dec 20 11:14:04 BNYATALIE kernel: PPP line discipline registered.
Dec 20 11:14:04 BNYATALIE kernel: registered device ppp0
Dec 20 11:14:04 BNYATALIE pppd[1477]: pppd 2.3.10 started by root, uid 0
Dec 20 11:14:04 BNYATALIE pppd[1477]: Using interface ppp0
Dec 20 11:14:04 BNYATALIE pppd[1477]: Connect: ppp0 <--> /dev/pts/2
Dec 20 11:14:05 BNYATALIE kernel: PPP BSD Compression module registered
Dec 20 11:14:05 BNYATALIE kernel: PPP Deflate Compression module registered
Dec 20 11:14:05 BNYATALIE pppd[1477]: CHAP peer authentication succeeded for
baust
Dec 20 11:14:05 BNYATALIE pppd[1477]: found interface eth0 for proxy arp
Dec 20 11:14:05 BNYATALIE pppd[1477]: local  IP address 10.1.1.69
Dec 20 11:14:05 BNYATALIE pppd[1477]: remote IP address 10.3.1.1
Dec 20 11:14:05 BNYATALIE pppd[1477]: CCP terminated by peer
Dec 20 11:14:05 BNYATALIE pppd[1477]: Compression disabled by peer.
Dec 20 11:14:36 BNYATALIE pppd[1477]: LCP terminated by peer
Dec 20 11:14:36 BNYATALIE pptpd[1476]: CTRL: Error with select(), quitting
Dec 20 11:14:36 BNYATALIE pptpd[1476]: CTRL: Client 24.163.35.141 control
connection finished
Dec 20 11:14:36 BNYATALIE pppd[1477]: Modem hangup
Dec 20 11:14:36 BNYATALIE pppd[1477]: Connection terminated.
Dec 20 11:14:36 BNYATALIE pppd[1477]: Connect time 0.6 minutes.
Dec 20 11:14:36 BNYATALIE pppd[1477]: Sent 1308 bytes, received 2558 bytes.
Dec 20 11:14:36 BNYATALIE pppd[1477]: Exit.
--------------------------------

Now a minute later, a different client tries to get in (she was able to get
in yesterday with no problems):
--------------------------------
Dec 20 11:15:00 BNYATALIE pptpd[1482]: CTRL: Client 24.190.9.158 control
connection started
Dec 20 11:15:00 BNYATALIE pptpd[1482]: CTRL: Starting call (launching pppd,
opening GRE)
Dec 20 11:15:00 BNYATALIE pppd[1483]: pppd 2.3.10 started by root, uid 0
Dec 20 11:15:00 BNYATALIE pppd[1483]: Using interface ppp0
Dec 20 11:15:00 BNYATALIE pppd[1483]: Connect: ppp0 <--> /dev/pts/2
Dec 20 11:15:30 BNYATALIE pptpd[1482]: CTRL: Error with select(), quitting
Dec 20 11:15:30 BNYATALIE pptpd[1482]: CTRL: Client 24.190.9.158 control
connection finished
Dec 20 11:15:30 BNYATALIE pppd[1483]: Modem hangup
Dec 20 11:15:30 BNYATALIE pppd[1483]: Connection terminated.
Dec 20 11:15:30 BNYATALIE pppd[1483]: Exit.
-------------------------------

See the difference?  Up in the first effort, i get a CSLIP University of
California statement, which didn't happen a mere 1 minute later with the 2nd
client.  The kernel is not even kicking in the 2nd client.

Why is this sometimes working and sometimes not?  It was working JUST FINE
for the 2nd client yesterday, but then she tries today and gets that
failure.

Any ideas at all?

I've tried so many combinations of poptop and ppp versions.  Right now i'm
using 1.0.0 with 2.3.10, but i've been trying with 1.0.1 and 2.3.11, with
similar results.

Any help or insight anyone can provide would be greatly appreciated.

Cheers,
Brian Aust

-----Original Message-----
From: George Vieira [mailto:georgev at citadelcomputer.com.au]
Sent: Tuesday, December 19, 2000 4:26 PM
To: 'Pontus Claesson'; pptp-server
Subject: RE: [pptp-server] Setting up a pptp server

I have RedHat 6.2 and upgraded my kernel to 2.2.17 from 2.2.16-3 and used
the instructions at
http://www.vibres.com/pptpd/example.html

Worked well for me. Don't downgrade your PPP to 2.3.8 but use the latest or
2.3.11

-----Original Message-----
From: Pontus Claesson [mailto:pontus at svulst.multima.se]
Sent: Wednesday, December 20, 2000 3:23 AM
To: pptp-server
Subject: [pptp-server] Setting up a pptp server

I\'m quite new to this so please be patient to me. 

I\'v sett up a RedHat 6.1 box runnning 2.2.17 and ipchains as a firewall for
a internal
10.0.0.1 net. I want to connect to the firewall somewhere on the internet
and be able to 
se all the \"internal\" machines, mount their disks an log on the W2k domain
thats
inside there.

After spending some time reading manny FAQ\'s and HOWTO\'s I\'m still a
little confused. 
Can someone please tell me if this is the right way to manage this. 

Get the source for ppp 2.3.8.
Get the source for SSLeya
Get the some kind of patch for ppp.

Aply the patches on ppp, and then compile it. 

I\'m currently running ppp 2.3.10-1 and have succeed installing the pptpd
RPM. 

When I try connecting to the server (with all the ipchains wide open) I get
several errors
such as

No free connection slots ot IPs - no more can connect. 
peer refused  to authenticate: terminating link

Can someone please help me with some bright ideas to sett this upp and to
config ipchains 
to accept the connections. 
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