Any free vpn clients

[xyzzy at hotpop.com]

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On Wednesday 04 February 2004 4:10 am, Christoph Wickert wrote:
> Am Mi, den 04.02.2004 schrieb Bevan C. Bennett um 02:56:
> > Troy Campano wrote:
> > > Are there any free VPN clients that I can run on Fedora?
> > > If not, are there any cheap ones? If so where (url)?
> >
> > It depends on what kind of VPN you want to connect with.
> >
> > If it's a PPTP type server, the following will help:
> > http://pptpclient.sourceforge.net/
>
> PPTP is very insecure. Only use it if really needed, e. g. you want a
> simple dial in with your win98 client. Otherwise I recommend FreeS/WAN
> or OpenVPN.
>
> Christoph

Why, exactly, is PPTP insecure?  Do you have any references for this?

If my ISP is running a PPTP server will FreeS/WAN or OpenVPN even work at all?
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