Geographic Load Balancing with DNS
Ryan
reply is "unavailable" on the news server. Basically what
I'd like to do is have W2K3 DNS servers return A records
for a site based on the IP range of the requesting
client. If the DNS query was from a client with a
211.x.x.x Class A than the DNS servers would answer with
the IP of my server in Asia. If the query was from a
client with an IP like 68.x.x.x than the IP of my server
in Los Angeles would be returned and on and on. I've read
that the W2K3 DNS server can do something like this now
based on netmask in the documentation. Is it possible for
the server to have several A records for a domain and
select the correct IP to return based on the IP of the
requesting client?
Thanks
Ryan
Roger Abell [MVP]
"Ryan" <ry...@realestatevideo.com> wrote in message
news:064a01c345a6$bda041f0$a301...@phx.gbl...
Ryan,
Here is the earlier reply from Thomas.
The post is, BTW, still there, so perhaps you should consider
using Outlook Express or another newsreader rather than the
web interface.
Just point the news client to msnews.microsoft.com
In message <042d01c34395$5f80a3c0$a501...@phx.gbl>, Ryan
<ry...@realestatevideo.com> writes
>Is it possible to configure W2k3 DNS servers to give
>differing A records based on IP range?
No. When you ask a DNS server for a record, it returns you everything it
can find (or a suitable error message).
> I'm looking for a
>simple way to do some sort of geographic load balancing
>via DNS. I want everything from 211.x.x.x to go to
>servers in Asia, everything from 68.x.x.x to point to
>servers on the West Coast etc.
You do this with DHCP. Setup the servers that are handing out 211
addresses to have one DNS server etc.
> I've noticed that the DNS
>server will give differing IP addresses based on subnet,
>will it do the same based on a list of IP ranges that I
>enter?
Strictly speaking it does not give differing IP addresses based on
subnet, it just sorts them based on networks.
But to answer your question: No.
Thomas
--
Thomas Lee
(t...@psp.co.uk)
Thomas Lee
<mvpN...@asu.edu> writes
>Here is the earlier reply from Thomas.
>
>The post is, BTW, still there, so perhaps you should consider using
>Outlook Express or another newsreader rather than the web interface.
>Just point the news client to msnews.microsoft.com
The problem is:
X-Newsreader: Microsoft CDO for Windows 2000
This 'newsreader' does not handle the references header properly and
breaks. It's been a but in MS's news client software for some time,
although I though it was fixed (in OE at least) by the big patch.
--
Thomas Lee
(t...@psp.co.uk)
Thomas Lee
<ry...@realestatevideo.com> writes
>I posted this question before but for some reason the
>reply is "unavailable" on the news server.
Yes. You are using the web intereface and it's broken:
X-Newsreader: Microsoft CDO for Windows 2000
> Basically what
>I'd like to do is have W2K3 DNS servers return A records
>for a site based on the IP range of the requesting
>client.
DNS does not work this way. It's designed to return ALL the records it
knows about.
> If the DNS query was from a client with a
>211.x.x.x Class A than the DNS servers would answer with
>the IP of my server in Asia.
You do this by using DHCP to assign the 'right' DNS server.
> If the query was from a
>client with an IP like 68.x.x.x than the IP of my server
>in Los Angeles would be returned and on and on. I've read
>that the W2K3 DNS server can do something like this now
>based on netmask in the documentation.
It changes the order of records returned, it does not limit the number.
> Is it possible for
>the server to have several A records for a domain and
>select the correct IP to return based on the IP of the
>requesting client?
The answer I gave last time is that this something you can do easily.
Roger Abell [MVP]
"Thomas Lee" <t...@psp.co.uk> wrote in message
news:+G0RwQPxhrD$EA...@qa.com...
I believe that is header from use of the MS web interface to the NGs.
The one or two times I explored that interface I can see why one cannot
find a reply even if the threading is not mixed up.
--ra
Thomas Lee
<mvpN...@asu.edu> writes
>I believe that is header from use of the MS web interface to the NGs.
>The one or two times I explored that interface I can see why one cannot
>find a reply even if the threading is not mixed up.
CDO is broken, even though some will argue the point!
But in this case, it simply can't handle the references header...
Sorry I can't break my news client enough to have it work with MS's
rfc-non-compliant interface. :-) in case of doubt.