Using TCP for checking

[Barry Margolin]

In article <grgd4o$1vnv$1 at sf1.isc.org>,
 Ben Croswell <ben.croswell at gmail.com> wrote:

> My one caution on this would be you may run into false negatives with TCP if
> people have misconfigured firewalls.
> It's surprising the number of people out there that believe TCP is only for
> xfers.

You'll also run into it for any domains hosted by Akamai.  Their custom 
servers don't currently support TCP at all.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
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