Russell Miller wrote:
Bill Davidsen wrote:
Adding the trailing dot, for names, prevents the value of the 'search'
field in /etc/resolve.com from being used. So
host fubar.bazfaz.net
could resolve to fubar.bazfaz.net.your.domain, if your DNS has a
wildcard MX record (like *.your.domain) would return a pointer to the
mail server for any address in your domain. If you add a trailing dot
that doesn't happen.
The value on an IP reverse lookup is unknown to me, there may be none.
I'm not entirely sure, but I think that trailing dot will cause it to
treat it as a forward and not a reverse lookup. Remember reverse
lookups get translated to 4oc.3oc.2oc.1oc.in-addr.arpa.
You are absolutely correct, it looks as if the "host" command strips the
dot (I get an answer), while the "dig" command sends a query to a root
server for the name as a forward lookup and gets back a "NX-domain"
(invalid domain name) response.
I still see no utility to this, there are no numeric TLDs and are
unlikely to ever be any.
--
Bill Davidsen <davidsen@xxxxxxx>
"We have more to fear from the bungling of the incompetent than from
the machinations of the wicked." - from Slashdot
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