Re: four basic "non techie" type questions regarding MS DNS and windows server IIS capabilities
- From: "Herb Martin" <news@xxxxxxxxxxxxxx>
- Date: Wed, 11 Jun 2008 06:33:54 -0500
"rvj" <rvj@xxxxxxxxxxxxxx> wrote in message
news:%23oFPKK4yIHA.4040@xxxxxxxxxxxxxxxxxxxxxxx
Conceptually it would be useful to be able to create multiple, possibly
hundreds, of domain aliases to the same host running web services I
understand this can be done by creating CNAME records
For the same name (just one) it makes sense to use a wild card.
Assuming that the the requests are primarily using http: or https: , in
theory you might have a limitless number
of aliases to the same web service (IIS) on the same physical host
http://cname1/
http://cname2/
Well they would technically be complete names: cname1.zonename.toplevel
1. are there any major drawbacks to to this - performance or otherwise?
Major? Only you can say, if you say "limitless" but hundreds of thousands
could be supported on modest hardware (by today's standards).
Obviously, more records takes more tme to search, more space (RAM and
DISK) to store, and perhaps more network bandwidth to replicate etc.
Wildcard makes more sense.
2. I assume as far ASP is concerned that the server varaiable
(server-url) will show the appropriate CNAME ?
ASP? ASP has to report something known to it from the Web Service
itself. It will show the server name that the web server uses; the host
name the user specified etc.
3. If a domain name cant be found, does the MS DNS allow support some kind
of error handling mechanism so that the unresolved requests can be
forwarded
Not for the SAME zone -- a zone is KNOWN in DNS to be either COMPLETE
on the server that holds it, or may DELEGATE a portion.
Resolution presumes that a DNS Server holding a zone, holds ALL of that
zone (or delegates a portion to a child zone/server-set.)
ie so the http request can be onward routed to another named host or
even the intended host but using the official host name rather than one
the aliases?
No, probably not how you mean it.
Yes, for zones not held (authoritative) on this DNS server.
4. does windows server IIS have the capability of creating DNS aliases
from script using say ASP
Pretty much anything can be done from a script IF you have the authority.
The main issues with ASP or any web script is you probably would never
give it the administrative privileges to do that -- but you might.
You could always just write to a "known file" which is picked up by a
system/admin level process that does the actual "work" of creating the
names or otherwise exercising admin privileges.
.
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