Cnames and "virtual name based hosting"
Jonathan de Boyne Pollard
J.deBoynePollard at Tesco.NET
Wed Apr 7 11:36:56 UTC 2004
f> I have heard rumors
... these "rumours" being prior postings to this very forum ...
f> that it would be illegeal and bad to use Cnames to point out
f> websites at webhotels using "virtual name based hosting".
It's illegal to use client-side aliases with virtual hosting because, as
Jeff Lasman _did_ explain to you, a domain name cannot be both a delegation
point and a client side alias. It is, therefore, impossible, when virtually
hosting a web site for the domain name at the apex of a "zone", to use
client-side aliases. One _must_ use server-side aliases.
<URL:http://homepages.tesco.net./~J.deBoynePollard/FGA/web-allowing-omission-of-www.html#DNS>
It is bad to use client-side aliases (in those situations where one actually
can use them) because, as Jeff Lasman _also_ explained to you, they usually
cause more DNS traffic to occur than not using them would. Moreover, as I
explained to you, several DNS server softwares (both proxy and content)
don't deal with client-side aliases at all well. If there are two ways of
doing things, only one of which involves using client-side aliases, one
should choose the other way.
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