Ascend Archive
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Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?
On Thu, 13 Nov 1997, Lou Melograna wrote:
> Is there a way to statically map IP bogus addresses to a valid IP address in order to be hit
> from the outside world?
Isnt that called ip aliasing? I know how to do it on a linux box. You have
to make sure that you have a route to the bogus address if its NOT in your
loca subnet, and of course this depends on your upstream provider as well.
> > Lou.
>
> ------------------------
> From: Scott Chrestman <src@netropolis.net>
> Subject: Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?
> Date: Wed, 12 Nov 1997 16:24:56 -0600 (CST)
> To: Edwin Yeh <ery2@po.cwru.edu>
> Cc: ascend-users@bungi.com
>
>
> > On Wed, 12 Nov 1997, Edwin Yeh wrote:
> >
> > > I don't know exactly how NAT works. (I'll be interested to know. All I can
> > > guess, is that when the packet exists the router, somehow the header
> > > information is wrapped.)
> >
> > From http://www.ascend.com/895.html :
> >
> > When the Pipeline first connects to the NAS, it receives an initial IP
> > address via PPP negotiation. The Pipeline then builds a
> > lookup table that matches the workstation's bogus address with the
> > registered address that the NAS assigns. The Pipeline
> > re-addresses packets destined for your workstation (i.e., destined to the
> > registered address) with the bogus address it actually has.
> > This translation is transparent both to the workstation and to devices on
> > the WAN.
> >
> > >
> > > But can you run servers (such as ftp server or web server) behnid the
> > > Pipeline router (running NAT)?
> >
> > Yes you can run them, but users from the outside world will not be able to
> > hit them.
> >
> > >
> > > In other words, is there a way for outside users to point to a specific
> > > machine inside the NAT subnet.
> >
> > No.
> >
> > >
> > > Thanks.
> > >
> > > Edwin
> > >
> > > P.S. I can think of a solution. That is, don't use NAT and run DNS after the
> > > pipeline router. The DNS effectively become the router and the pipeline
> > > effectively become a Terminal Adapter. But if this is the case, why buy the
> > > pipeline. We can do it with ~$150 ISDN TA. We are using pipeline because
> > > it's cost effective for a subnet running multiple machines and the router
> > > performs better than the computer. However, functionality will come before
> > > performance. If we cannot solve this problem, we will be forced to drop the
> > > pipeline solution.
> >
> > I totally dont understand what you mean by "The DNS effectively becomes
> > the router", as they are two TOTALLY different things, doing two TOTALLY
> > different functions, but your overall answer is NO. Go buy a Motorola
> > BitSucker Pro for $150, and save some cash.
> >
> > Scott R. Chrestman
> > System Administrator
> > Netropolis Communications Corp.
> > src@netropolis.net
> >
> > ++ Ascend Users Mailing List ++
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> > To get FAQ'd: <http://www.nealis.net/ascend/faq>
>
> ---------------End of Original Message-----------------
>
> -------------------------------------
> Name: Lou Melograna
> E-mail: Lou Melograna <lmelogra@atrioncomm.com>
> Atrion Communications Resources
> 185-I Industrial Parkway
> Branchburg, NJ 08876
> Phone: 908.231.7777 ext.112
> Fax: 908.231.8228
> Date: 11/13/97
> Time: 09:12:07
> "When Quality Counts"
> -------------------------------------
>
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