DynamicIP and DNS

Simon Waters Simon at wretched.demon.co.uk
Sat Jun 23 20:12:11 UTC 2001


Pete Wood wrote:
> 
> I have a setup where I have a Win2000 Server connected via ADSL to the
> internet, this server gets assigned a dynamic IP address upon connection.  I
> also have a Linux box with private IP address 192.168.0.2.  I would like to
> use the Linux box for www, mail, ftp etc and simply use the Win2000 box just
> to maintain the connection/DNS etc.  

Hi Pete, 

I think you need to do some more background reading.

To get IP connections forwarded from one box to another is
nothing to do with the DNS. What is required is either some
sort of Proxy, or "port forwarding" or "Network Address
Translation".

The rules regarding RFC1918 (192.168.0.0/16 and others)
address space basically say these have nothing to do with
the Internet. They shouldn't appear in the DNS (i.e. the
Public DNS, clearly your Windows 2000 box needs to know the
IP address of the Linux box, and the Linux box the local IP
address of the Windows 2000 server), and the depending how
you configure it one or both of the boxes will access to the
DNS.

I believe that Windows 2000 provides such a service, but
with my Linux User Group hat on I'd suggest that offering
these kinds of services has been a strength of the Linux
operating system and you might look at doing it that way.

<RANT>For the benefit of our foreign readers <sic>, the UK
near monopolistic and former state utility BT sells ADSL
connections, but the Ethernet version of the service is
bizarrely more expensive than the USB version, which is how
I suspect this query arises</RANT>.

If you decide to try USB on Linux for ADSL this has been
discussed on uk.comp.os.linux with HOWTO's etc. Try
www.deja.com for a list of old articles.

	Simon
-- 
Simon Waters
Are you using the Internet to best effect ?
www.eighth-layer.com
Tel: +44(0)1395 232769      ICQ: 116952768
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