Re: dns query

yah, the way it design is a load balance where user come by public ip and it
load balance among the internal server and for my scenario is abit different
is more to load balance as well on the public ip which is from the different
isp.it is a bit confusing when try to load balance on the especialy on the
public ip.like for other country when they ping www.domaina.com they will get
public ip a and on my country when i ping i will get a different public ip.I
still read on these but cant realy understand well on the bird eye view how
it work.


"Ace Fekay [MVP]" wrote:

In news:87245B5A-8F8E-43C0-87DB-9A720EF04C4E@xxxxxxxxxxxxx,
ckwong19802003@xxxxxxxxx <ckwong19802003@xxxxxxxxx> stated, which I
commented on below:
hello

We are using F5 hardware load balancer,and it seem on the linux
machine what they need to do is add the 2 nameserver which is the
load balancer public ip and create a cname of
mail.balancer.domainA.com.

which dont know how all request for the
mail.balancer.domainA.com will be forwarded to the 2 balancer ip.

Even I do the same configuration it wont work on windows,

the only thing
can be done is add a forwarder for domaina.com to the load balancer
ip then these will work perfectly fine.

and for other few domain that
need to resolve locallly then have to create a zone file called as
server01.domainA.com with the internal ip address.

Just the problem if
we create those A record on the domainA.com such as www then it only
point to 1 public ip address, and if one of the link down , we have
to manual change the dns to point to other ip address.

From your
experty is that possible to do like if i want to query a fqdn then it
will forward to the nameserver to seach for the record

I'm trying to interpret your response. With everything in one large
paragraph, minimal punctuation and the context melting/jumping from one
point to the next, can get a little confusing.

I have not used F5 Balancer, so I am not sure how it actually needs to be
configured, and I would need to read up on it, but do not have the time or
resources at this time to do so. But my first guess it won't work with DNS,
Windows, BIND or any other.

For multiple DNS servers, I would just actually create multiple DNS servers.
If you havbe multiple internal DNS servers that you need to be available for
public use, I would use a device like a PIX that supports multiple outside
addresses and port remap the respective IP to the respective internal DNS
server.

Do not mix public IPs and private IPs under the same zone or you will
encounter problems. If you have an internal domain called domainA.com and
an outside domain with the same name, then the outside public DNS server
would have the public IPs, and the separate internal DNS server would have
the private IPs.

As for www, if you have a load balancing web service, such as Dell's BigIP,
one IP is all you need. BigIP actually supports multiple web servers in what
they call a "farm". The http requests coming in on one IP, will get load
balanced between the servers in the farm. It also offers fault tolerance
that if one server were not to respond, it takes it out of the eligble list.

For DNS, create multiple WWW records, one for each IP.

Ace






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