From: Jay Hennigan (no email)
Date: Sat Mar 08 2008 - 15:58:15 EST
Dave Pooser wrote:
> Half the Mac users? You think? I know a dozen or so sysadmins who use Macs,
> and about a hundred users who wouldn't know SSH from PCP; I think that's
> probably a slightly skewed sample considering I'm a Mac geek who hangs
> around with Mac geeks, and I'd guess the consumer users are a larger
> percentage of the real-life population.
I was quite surprised to see the large number of Mac laptops at NANOG
42. I didn't do a formal count but it seemed like about 1/4 to 1/3 of
the laptops in use were Macs.
> I'd expect the number of folks who
> want SSH unblocked to be under 1% of a consumer broadband network, and
> probably closer to 0.1% or so. And again, it ought to be trivial to let your
> users unblock the system, either via phone call or via self-service Web page
> (though in the latter case you'd better use a captcha or something so the
> bot doesn't automatically unblock itself).
I'm against the slippery slope of blocking ports by default, with the
possible exception of SMTP if the provider offers a well-publicized
local SMTP server.
Servers that must leave ssh open to the Internet can and should consider
using some form of time-out script like this one:
-- Jay Hennigan - CCIE #7880 - Network Engineering - Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV