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Re: Customer-facing ACLs
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
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: http://www.pettingers.org/code/SSHBlack.html
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