Intermittent incorrect DNS resolution?

Jean-Francois Mezei jfmezei_nanog at vaxination.ca
Wed Jan 16 23:09:10 UTC 2013


Consider the possibility that some end users (or even corp networks) may
have hardcoded your hosts' translation into their hosts files or perhaps
corporate proxy firewalls that allow access onto to whitelisted web sites.

They will continue to point to the old IP addresses until you shutdown
the service and they call you to inquire why *you* broke your system :-)

If this HTTP service has a GUI (aka: web page versus credit card
transactions), you should put up a warning on the web page whenever it
is being accessed via the old IP address.



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