[ILUG] Cisco VPN Client and NTL Broadband

[Barry O'Donovan]

Pádraig is probably on the right track.

Can you send the output of the following three commands with and without the 
VPN tunnel being initialised:

route -n
ifconfig
cat /etc/resolv.conf

What may also be useful is the output of a program called lft (Layer Four 
Traceroute). If you could install it and run the following, again with and 
without the VPN:

lft www.google.com

It would answer a lot of questions. LFT will try and traceroute using TCP port 
80.

Deoending on you system, you may need to be root for some of the above 
commands.

 - Barry


On Saturday 09 February 2008 01:06:58 Pádraig Brady wrote:
> Éibhear wrote:
> > Hi,
> >
> > We have recently switched from Eircom Broadband to Chorus/NTL.
> >
> > The biggest problem is when my wife connects into her place of work.
> > Whenever she attempts to access any web page, it never renders. What I
> > can see is that the HTTP connections are timing out. But I don't know
> > where to go from there.
> >
> > Perhaps someone on ILUG can offer some pointers on what I can do to
> > figure out what's going on.
> >
> > The following is what I believe is relevant information:
> > + Debian Etch
> > + Cisco VPN Client 4.6.02
> > + Scientific Atlanta cable modem
> > + Firefox (though I see this behaviour with Konqueror and lynx)
> > + Using telnet to the server and port and then using the HTTP
> >   GET command for the specific URL works: the HTML source is
> >   returned.
> > + Other connection types seem to work fine (IMAP for e-mail,
> >   telnet, ping, etc.)
> >
> > Can you suggest a few things or tools I could use that would help me out?
>
> This only happens when the VPN client is initialised right?
>
> It's weird that only HTTP has an issue.
> Perhaps there is a proxy setting somewhere?
>
> I'd guess that the VPN client sets the default route
> out it's virtual interface. So you may want to (re)set
> the default route out your actual ethernet device.
> The VPN server though may not allow this however depending on settings.
>
> Take this with a pinch of salt as I know feck all about VPNs.
>
> Pádraig.



-- 

Kind regards,
Barry O'Donovan

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