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<div class="moz-cite-prefix">On 9/10/2014 11:58 AM, Alan Clegg
wrote:<br>
</div>
<blockquote cite="mid:54107514.2020609@clegg.com" type="cite">
<pre wrap="">On 9/10/14, 8:42 AM, Sam Wilson wrote:
</pre>
<blockquote type="cite">
<pre wrap="">And you could reduce maintenance very slightly by replacing
www in A 75.100.245.133
with
www in CNAME @
</pre>
</blockquote>
<pre wrap="">
And now you have an MX record, 3 NS records and a bunch of other crap
associated with the WWW address. </pre>
</blockquote>
And why is that a _bad_ thing?<br>
<br>
If I ever change that IP, I want to change it in *one*place*. The
CNAME allows everything to automatically follow that change. Why
necessitate multiple updates when a single update will do? If
TTL-manipulation is necessary in order to minimize caching
complications, the number of RRset updates is magnified, of course.<br>
<br>
MXes and NSes are a non-issue, IMO, since the contexts in which
people look up a "www" name (usually end-users trying to access a
website) are usually quite disjoint from the use cases of MXes
(automated systems delivering mail) or NSes
(nameserver-to-nameserver traffic). I see little or no risk of
confusion or misdirection.<br>
<br>
I suppose it's _possible_ that some day a mail sender might mistype
a recipient as <a class="moz-txt-link-abbreviated" href="mailto:user@www.example.com">user@www.example.com</a> instead of (as they should have)
<a class="moz-txt-link-abbreviated" href="mailto:user@example.com">user@example.com</a>, and maybe in that scenario the CNAME will cause
the recipient address to show up in the headers of the received
message in an unexpected way. But, to me, this falls under the
generic category of GIGO (garbage in, garbage out) -- you type
something wrong into a computer system, you might not get the
results you expected...<br>
<br>
- Kevin<br>
<blockquote cite="mid:54107514.2020609@clegg.com" type="cite">
<pre wrap="">
</pre>
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