expose internal network to the outside world

[Alex Beamish]

On 9/15/05, Lennart Sorensen <lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org> wrote:
> 
> On Wed, Sep 14, 2005 at 10:40:29PM -0400, Alex Beamish wrote:
> > Hi Matt,
> >
> > I believe what you want is port forwarding, or what you referred to as
> > 'trigger ports'.
> >
> > As you described, a call on port 1000 will go to one machine, and a call 
> to
> > port 2000 will go to another machine.
> >
> > I believe if you had a real firewall instead of a little router (I have 
> a
> > Netgear, same kind of box as yours), you could have subdomains, because
> > dyndns.org <http://dyndns.org> <http://dyndns.org> would pass
> > 1.mydomain.dyndns.org <http://1.mydomain.dyndns.org><
> http://1.mydomain.dyndns.org>to your machine,
> > identified as
> > mydomain.dyndns.org <http://mydomain.dyndns.org> <
> http://mydomain.dyndns.org> for further subdomain
> > resolution. But I'll be happy to hear an explanation from someone who 
> knows
> > what they're talking about.
> 
> One IP = One service/port.
> 
> DNS is only used to lookup what the IP is. It doesn't get passed to the
> server at all (except in http 1.1 and the like). All it sees is
> connection from x.x.x.x port xxx to y.y.y.y port yyy.


OK -- from a name-resolving point of view, the protocol I'm most familiar 
with is HTTP -- hence my mistaken assumption. I'm glad to be corrected.

Alex

> I use dyndns.org <http://dyndns.org> <http://dyndns.org> and port 
> forwarding myself -- works
> > beautifully.
> 
> Lennart Sorensen
> --
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