Ascend Archive
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Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?

Is there a way to statically map IP bogus addresses to a valid IP  address in order to be hit 
from the outside world?

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
> 
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---------------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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