IP Masquerading & DNS Lookups

IP Masquerading & DNS Lookups

Post by Dave Nutta » Wed, 21 Aug 1996 04:00:00



I've got a Win95 <--> Linux (2.0.13) <--> ISP lashup working in most cases.
This news posting is being done from the Win95 while passing thru Linux.

However, SOME but not all attempts to let Netscape do DNS lookups fail.
Starting with Netscape and AltaVista!!

POP mail, FTP and telnet all work fine.

Any one have a similar experience?
Did you solve it?!!!

Thanks

Dave Nuttall

San Antonio, TX

 
 
 

IP Masquerading & DNS Lookups

Post by Stewart O. All » Fri, 23 Aug 1996 04:00:00


: I've got a Win95 <--> Linux (2.0.13) <--> ISP lashup working in most cases.
: This news posting is being done from the Win95 while passing thru Linux.

: However, SOME but not all attempts to let Netscape do DNS lookups fail.
: Starting with Netscape and AltaVista!!

: POP mail, FTP and telnet all work fine.

: Any one have a similar experience?
: Did you solve it?!!!

 Dave,

 Which version of Netscape are you using? I remember a while back a bug
 was reported with Netscape using Linux machines as DNS servers. Something
 about them using a "feature" of DNS which Linux didn't implement. This
 is from the depths of my memory, so the specifics are lost.

 I remember this because I had this very same problem. I'm now running the
 newest Netscapes and a 2.x kernel. In fact, this may be due more to the
 new kernel (or nettools) than the newer Netscape. Do you have the option
 of trying a 2.x kernel?

 Anyway, problem solved. Haven't seen this in about a year.

 +-
 | Stewart Allen                                               ftp.neuron.com

   617.492.2089 FAX 617.492.5837                   Neuron Information Systems |
                                                                             -+

 
 
 

IP Masquerading & DNS Lookups

Post by Dave Nutta » Mon, 26 Aug 1996 04:00:00




>: I've got a Win95 <--> Linux (2.0.13) <--> ISP lashup working in most cases.
>: This news posting is being done from the Win95 while passing thru Linux.

>: However, SOME but not all attempts to let Netscape do DNS lookups fail.
>: Starting with Netscape and AltaVista!!

>: POP mail, FTP and telnet all work fine.

>: Any one have a similar experience?
>: Did you solve it?!!!

> Dave,

> Which version of Netscape are you using? I remember a while back a bug
> was reported with Netscape using Linux machines as DNS servers. Something
> about them using a "feature" of DNS which Linux didn't implement. This
> is from the depths of my memory, so the specifics are lost.

> I remember this because I had this very same problem. I'm now running the
> newest Netscapes and a 2.x kernel. In fact, this may be due more to the
> new kernel (or nettools) than the newer Netscape. Do you have the option
> of trying a 2.x kernel?

> Anyway, problem solved. Haven't seen this in about a year.

> +-
> | Stewart Allen                                               ftp.neuron.com

>   617.492.2089 FAX 617.492.5837                   Neuron Information Systems
|

-+

Yes to most/all of the above.
Moved to Netscape 3.xGold.Silver&Bronze (on Win95)
Changed Win95 DNS references to closest ones I could find.
Moved to RH 3.0.3 w/kernel 2.0.13 + all known bells & whistles.

Now everything works as I'd like it to work!

In the process I "seem" to have learned that following/setting up
the cache.DNS on the Linux box (per RH/DNS-how-to) works fine on the
Linux side but is not passed to the Win95 box for some reason....
probably because I haven't masqueraded the "localhost" DNS config
per the how-to.

It doesn't seem to be necessary, although for the sake of what works
discussions, it might be worthwhile to look at it.  Ping can see the
127.0.0.1 from Win95...but putting that first in the Win95 DNS listing
actually seems to slow it down.   What this tells me is that regardless
of what you have resolving on the Linux host, Win95 will use its own
settings.  Perhaps if you have none (which I haven't tried) it might
use the Linux host...I just haven't spent all the time and reboots
necessary to step through all the possibilities.

Anyway...what works is:
IP masquerade of course w/specific pointer to the Win95 box.
plus
Win95 set to one or two DNS sites specified best by the ISP.
Linux connecting with CSLIP

Your mileage may vary.  This seems to provide a reasonably (as possible)
simple setup with nearly as good of performance as I can sense by having
the Win95 box handling the modem directly to the ISP.

It's truly a giant step in the Linux world and in this case is going to
provide a living/working example to 8th grade computer students how some
good things in life can be enjoyed without paying MS for everything!

Thanks to all who commented/helped off-line.

Dave Nuttall

San Antonio, TX

 
 
 

1. IP Masquerade & DNS lookup failure

I recently set up IP Masquerading, and it works ok, except DNS lookups.
When running from the windows 95 workstations, the DNS lookup fails.
The windows systems are set to use the proper name servers, and when
dialed in to the provider with PPP it works OK.  The linux system also
does NDS lookups properly.  Does anyone know what is going on here.

Thanks,
Jim Conley

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