Ascend Archive
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Re: (ASCEND) Q. Can you run servers behind Pipeline (running NAT)?
In this case, I don't think it's even necessary though....see my other
replies.
At 10:35 AM 11/13/97 -0600, Jake Messinger wrote:
>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 ++
>> > To unsubscribe: send unsubscribe to ascend-users-request@bungi.com
>> > 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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>>
>
>~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
> Jake Messinger 713-772-6690 jake@ams.com
> Advanced Medical Systems, Inc. jake@uh.edu
> 8300 Bissonnet #400 fax: 713-774-3498
> Houston, Texas 77074 http://www.ams.com/~jake
>~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~'`^`'~*-,._.,-*~
>
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>
Kevin
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