Wildcard DNS (pros and cons)
Jonathan de Boyne Pollard
J.deBoynePollard at Tesco.NET
Sat Dec 11 12:42:11 UTC 2004
J> What is the purpoase of allowing *.example.com within a DNS Zone?
One common purpose is to set up a catch-all server, to which all
traffic, of every type, is directed. I said it here a month ago, and
several times before that during the past couple of years, and I'll say
Be aware that catch-all servers are a lot of work - more work than most
people think. Internet is not just HTTP, misconceptions to the contrary
notwithstanding. At the very least, you'll have to deal with, on your
catch-all server, quite a large number of other popular TCP services in
a manner that doesn't cause data loss for your customers or an invasion
of privacy. This is not a trivial exercise.
If you aren't either prepared or able to do this properly, I strongly
suggest not doing it at all.
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