Re: VPN / IPSec Help

From: Kerry Hoskin (kjho@pml.ac.uk)
Date: 09/26/02 

From: "Kerry Hoskin" <kjho@pml.ac.uk>
Date: Thu, 26 Sep 2002 21:59:48 +0100

it might be quicker to setup PPTP to use over your VPN rather than L2TP.
This is still very secure, not as secure as L2TP but it doesn't use IPSEC
for its security so it doesn't suffer from problems of routers, NATs' etc
interfering with the packets.

Kerry

"Richard Morey" <rwmorey71@hotmail.com> wrote in message
news:eIZ7C4ZZCHA.2392@tkmsftngp08...
> Hi..
>
> > Does your router act as a NAT or are you using ICS?? If so and you're
>
> I don't know.. How do I find out ?
>
> Someone else suggested that NAT was part of what was making this not work
so
> I played around with port forwarding settings on the router but that
didn't
> seem
> to make a difference so I reset those settings back to the default.
>
> I'll take a look at the article you mentioned and see if that gets me
> anywhere..
>
> Thanks
>
> Rich
>
>
> > trying to use IPSEC things won't work. If you have IPSEC configured and
> you
> > don't need it turn it off. Or (more likely) if you're using L2TP for you
> VPN
> > connection, which uses IPSEC then try configuring PPTP instead. It
sounds
> > like your router is making changes to the IP packets which is then being
> > rejected by your server as it doesn't pass the IPSEC filters.
> >
> > Article Q310109 explains how you can turn L2TP/IPSEC off if you wish, of
> > course then the VPN tunnel wouldn't be fully secure.
> >
> > Kerry
> >
> > "Richard Morey" <rwmorey71@hotmail.com> wrote in message
> > news:#P6uIcZZCHA.1776@tkmsftngp10...
> > > Hi..
> > >
> > > I am trying to set up a VPN between my home and my office. Both
> locations
> > > have a cable modem connection to the internet. All machines on the
> office
> > > network are running Windows 2000. (1 Server, 2 clients) I have a
laptop
> > also
> > > running Windows 2000.
> > >
> > > I have a Linksys VPN (BEFVP41) router at the office and a regular
> Linksys
> > > router (BEFSR41) at home. The reason I have a router at home is that
my
> > > wife has a computer as well and we share our internet connection via
the
> > > router.
> > >
> > > I followed the directions in the back of the Linksys VPN router on
> setting
> > > up the VPN. If I connect my laptop directly to the internet via the
> cable
> > > modem (taking the router at home out of the equation) the VPN
connection
> > > works and I can access my network server at the office.
> > >
> > > However, when I put the Linksys router in place the connection does
not
> > get
> > > made. If I try to ping the server at the office from the laptop I get
a
> > > negotiating security message but no reply from the office machine.
> > >
> > > I have tried various settings, etc. in the Security Policy manager on
my
> > > laptop. I get this error message in the Event log:
> > >
> > >
> > > The IPSec driver failed the oakley negotiation with 192.168.1.105
since
> no
> > > filter exists to protect packets to that destination. Please check the
> > > configuration on this machine to ensure at least one filter matches
the
> > > destination.
> > >
> > >
> > >
> > > 192.168.1.105 is the IP address of the office server and I get this
> error
> > > when I try to ping that machine.
> > >
> > > I have tried various settings as far as changing my subnet to
> 192.168.2.x
> > > instead of 192.168.1.x but that hasn't yielded any result.
> > >
> > > I am hoping someone out there has enough experience with this to give
me
> a
> > > as detailed as possible walk through of how to setup both my "plain"
> > router
> > > (at my home) and my Windows 2000 laptop so that I can make the VPN
> work..
> > >
> > > Thanks!
> > >
> > > Rich
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>
>
>

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