Discussion list for Poptop, an open source implementation of PPTP (Point to Point Tunnelling Protocol), used for setting up VPNs ()

Paul Faure | 1 Dec 2004 17:58

from network failed: status = -1 error = Message too long

Well, I have a pptpd server running, and windows clients can connect to
it with no problem and download any and all data.

But when I try to connect via a linux client, I get this error in the
pptpd server:
  Dec  1 11:34:09 vpn pptpd[4534]: GRE: read(fd=6,buffer=8055600,len=8260) 
  from network failed: status = -1 error = Message too long
  Dec  1 11:34:09 vpn pptpd[4534]: CTRL: GRE-tunnel has collapsed (GRE
  read or PTY write failed (gre,pty)=(6,5))

This occurs when I try to download certain web pages. Simple pings can
traverse the link quite easily before I try to get a webpage.

Thank you for your help, sorry if this should have gone to the pptp
client mailing list.

--

-- 
Paul N. Faure, B.Eng                      613.262.2354
Computer Systems Engineering              paul-at-faure-dot-ca
Chief Technical Officer, CertainKey Inc.  paul-at-certainkey-dot-com

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Peter Mueller | 1 Dec 2004 18:59

RE: from network failed: status = -1 error = Message too long

> Well, I have a pptpd server running, and windows clients can 
> connect to
> it with no problem and download any and all data.

.

> But when I try to connect via a linux client, I get this error in the
> pptpd server:
>   Dec  1 11:34:09 vpn pptpd[4534]: GRE: 
> read(fd=6,buffer=8055600,len=8260) 
>   from network failed: status = -1 error = Message too long
>   Dec  1 11:34:09 vpn pptpd[4534]: CTRL: GRE-tunnel has collapsed (GRE
>   read or PTY write failed (gre,pty)=(6,5))
> 
> This occurs when I try to download certain web pages. Simple pings can
> traverse the link quite easily before I try to get a webpage.

What version of ppp, poptop, mppe, and pptp-client are you running?  This
looks like an MTU problem.  Are you allowing ICMP packets between the client
and server?  If ICMP doesn't fix the problem for you, you could try this
hack: 

http://marc.theaimsgroup.com/?l=poptop-server&m=109648211223693&w=2

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(Continue reading)

Paul Faure | 1 Dec 2004 19:31

Re: from network failed: status = -1 error = Message too long

> > But when I try to connect via a linux client, I get this error in the
> > pptpd server:
> >   Dec  1 11:34:09 vpn pptpd[4534]: GRE: 
> > read(fd=6,buffer=8055600,len=8260) 
> >   from network failed: status = -1 error = Message too long
> 
> What version of ppp, poptop, mppe, and pptp-client are you running?  This
> looks like an MTU problem.  Are you allowing ICMP packets between the client
> and server?  If ICMP doesn't fix the problem for you, you could try this
> hack: 

Server:
pppd version 2.4.2
PPPoE-Server Version 3.5
Dont know how to check for the mppe version on the server, but it runs
as a module called ppp_mppe.ko
PoPToP v1.1.4-b4

Client:
pppd version 2.4.2
PPPoE Version 3.5
pptp-linux version 1.5.0
Poptop v1.2.1

I can ping the vpn server outside the VPN connection, and through the
VPN connection. So ICMP are enabled.

> http://marc.theaimsgroup.com/?l=poptop-server&m=109648211223693&w=2

I am about to try those options now... Thank you.

(Continue reading)

Paul Faure | 1 Dec 2004 23:15

Re: from network failed: status = -1 error = Message too long

> > http://marc.theaimsgroup.com/?l=poptop-server&m=109648211223693&w=2

FYI, this site fixed me right up. I had to set the MTU and MRU inside
the pptp options file, then manually change the MTU on the ppp1
interface, and everything worked fine :) Thank you.

--

-- 
Paul N. Faure, B.Eng                      613.262.2354
Computer Systems Engineering              paul-at-faure-dot-ca
Chief Technical Officer, CertainKey Inc.  paul-at-certainkey-dot-com

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P.G. Willemsen | 3 Dec 2004 14:38

Picon

Simple login success, but no IP, MS-CHAP, MPPE, DNS etc.

Hi all,

I got pptpd working with the following settings:

pptpd version: 1.1.4-0.b4.1mdk
ppp version: 2.4.1-13mdk
mandrake linux version: 10.0

--- /etc/pptpd.conf ---
localip 192.168.0.234-238,192.168.0.245
remoteip 192.168.1.234-238,192.168.1.245
--- end of pptpd.conf ---

--- /etc/ppp/options ---
lock
auth
+chap
usepeerdns
ms-dns 192.168.0.2
--- end of ppp/options ---

--- settings on windows pc (client) ---
encryption optional
allowed protocols: CHAP, MS-CHAP
--- end of client settings ---

With these settings, the following works:

* I can connect from the windows client to the linux pptp server

(Continue reading)

Vicent Roca Danel | 6 Dec 2004 13:50

Picon

Picon

poptop server crashes with more than 16 users

hi all.
I'm new in the list. First of all sorry for my
english.
I'm a admin on a lan, and I have a problem with poptop
server.
He seems that run excelent.. but, when there are about
16 users concurrents, it begin to work bery bad. It
repeat ip's, and users don't have connecion.
There are any user limit on poptop?
I readed all the doc, and I see that is frequent to
hava 100 clients whithow problems.

¿any idea?
Thx in advance.
I repeat, sorry for my bad english :(
:D

		
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Martin Liddle | 6 Dec 2004 14:06

Picon

Re: poptop server crashes with more than 16 users

In message <20041206125055.68923.qmail <at> web51110.mail.yahoo.com>, Vicent 
Roca Danel <saptah2000 <at> yahoo.es> writes
>I'm a admin on a lan, and I have a problem with poptop
>server.
>He seems that run excelent.. but, when there are about
>16 users concurrents, it begin to work bery bad. It
>repeat ip's, and users don't have connecion.
>There are any user limit on poptop?
>I readed all the doc, and I see that is frequent to
>hava 100 clients whithow problems.
>
Start by telling us what version of pptpd, kernel and ppp you are using. 
List your pptpd.conf file.
--

-- 
Martin Liddle, Tynemouth Computer Services, 27 Garforth Close,
Cramlington, Northumberland, England, NE23 6EW.
Phone: 01670-712624.
Web site: <http://www.tynecomp.co.uk>.

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Discover which products truly live up to the hype. Start reading now. 
http://productguide.itmanagersjournal.com/

Ray Van Dolson | 6 Dec 2004 16:08

Re: poptop server crashes with more than 16 users

I've dealt with a *lot* of instability issues (still am really, but am
getting close to relative stability these days).  Maybe your problems
are similar?

What type of hardware are you running on?  Linux kernel version?  
Poptop version?  PPP version?  MPPE version (if any)?

Ray

On Mon, Dec 06, 2004 at 01:50:55PM +0100, Vicent Roca Danel wrote:
> hi all.
> I'm new in the list. First of all sorry for my
> english.
> I'm a admin on a lan, and I have a problem with poptop
> server.
> He seems that run excelent.. but, when there are about
> 16 users concurrents, it begin to work bery bad. It
> repeat ip's, and users don't have connecion.
> There are any user limit on poptop?
> I readed all the doc, and I see that is frequent to
> hava 100 clients whithow problems.
>
> ¿any idea?
> Thx in advance.
> I repeat, sorry for my bad english :(
> :D

-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.

(Continue reading)

Vicent Roca Danel | 6 Dec 2004 17:12

Picon

Picon

Re: poptop server crashes with more than 16 users

ok, it's true. Thanks both for your answers.
Wel, this is my config:

kernel:
2.4.28 #1 Tue Nov 23 00:38:05 CET 2004 i686 GNU/Linux

The Linux is an Debian GNU/Linux (woody)
pppd version 2.4.2b1
PoPToP v1.1.2

I'm using the Jan Dubiec MPPE implementation
(http://www.polbox.com/h/hs001/)

The machine:
Pentium IV, 2.8, with 1GB RAM.

I don't see nothing strange in the syslog. The poptop
aparently works fine, but, it dosn't work ok.

I'm reading about this problem.
Thx !! =)

 --- Ray Van Dolson <rayvd <at> digitalpath.net> escribió: 
> I've dealt with a *lot* of instability issues (still
> am really, but am
> getting close to relative stability these days). 
> Maybe your problems
> are similar?
> 
> What type of hardware are you running on?  Linux

(Continue reading)

Martin Liddle | 6 Dec 2004 17:40

Picon

Re: poptop server crashes with more than 16 users

In message <20041206161210.91480.qmail <at> web51107.mail.yahoo.com>, Vicent 
Roca Danel <saptah2000 <at> yahoo.es> writes
>Wel, this is my config:
>
and your pptpd.conf ?
--

-- 
Martin Liddle, Tynemouth Computer Services, 27 Garforth Close,
Cramlington, Northumberland, England, NE23 6EW.
Phone: 01670-712624.
Web site: <http://www.tynecomp.co.uk>.

-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now. 
http://productguide.itmanagersjournal.com/

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