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Old 08-14-2008, 03:50 AM
Chris Jeffries
 
Default ubuntu-users Digest, Vol 48, Issue 215

(Please ignore the --- in the following message. They are there for a
reason, but it is not for human perception purposes.)

I wonder if anyone has got V---P---N up and running on Ubuntu. If so,
perhaps you could share your experience or point me somewhere where you
already shared it, because I am struggling.

My situation is described below

I am buying from a service provider and it works fine on Windows but I
have failed to make it work on Ubuntu. The error message is

Could not start the V---P---N connection 'BananaPPTP'
due to a connection error.
VPN Connection failed

My provider is www.bananav---p---n.com (remove the ---)

I chose
PPTP Tunnel (elsewhere referred to as Windows V---P---N (P--P--T--P))
rather than OpenV--P--N Client or vpnc

QUESTION: did I choose right.

The settings I am using are as follows:

Under Connection
used same IP address as in Windows
Under Authentication
None of the boxes (Authenticat Peer, Refuse EAP, refuse CHAP, Refuse
MS CHAP) is checked
(I also tried it with all refused except MS CHAP, and again with all
refused except CHAP)
Compression and encryption
No optons checked except Enable stateful MPPE
PPP Options
Nothing set except thwe following (all defaults)
MTU 1416
MRU 1416
lcp echo failure 10
lcp echo interval 10
Routing
Peer DNS through tunnel is checked
No restrictions on which addresses to use VPN for

QUESTION: is something wrong with these settings

The service provider sent me this in response to my query:

According to the sevrver log, it is failing due to the authentication
method.
Try changing it to CHAP or PAP.

Also if you want to connect with L2TP the sharedkey for IPSEC is:
******* (obfuscated by me)

QUESTION can I use PAP and if so, how. Can I use L2TP and again, if so
how.

I am not keen to change my service provider since I have a 6 month
contract running. But perhaps the
only choice is to go with someone who supports Linux (even Ubuntu)
specifically). My current
provider seems to be able to support Windows very well, but support for
anything esle seems a bit
' un sure footed '.


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Old 08-14-2008, 02:07 PM
"Brian McKee"
 
Default ubuntu-users Digest, Vol 48, Issue 215

On Wed, Aug 13, 2008 at 11:50 PM, Chris Jeffries <chris@candm.org.uk> wrote:
> (Please ignore the --- in the following message. They are there for a
> reason, but it is not for human perception purposes.)

Trying to avoid a content filter at work? I mean VPN isn't a dirty word.
How the heck did you expect anyone to reply without using it?


> I chose
> PPTP Tunnel (elsewhere referred to as Windows V---P---N (P--P--T--P))
> rather than OpenV--P--N Client or vpnc

PPTP can be broken. IIUC (and that's a definate *if*) the attacker
has to capture you logging into your vpn at least once, but more often
is better, and then can take home the packets and hammer on them at
his leisure to break your password. AFAIK, once up, PPTP is secure.

On the other hand, pptp is usually simpler to set up than the alternatives.

> The settings I am using are as follows:

I'm not sure how to troubleshoot this, each of those settings can be
valid in a different situation. What you have to do is match what the
provider expects.

If the provider says you are not using the right auth method - what do
your logs indicate? That would be a good place to start.

Brian

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