SSH Login Speed

Lonnie Olson lists at kittypee.com
Thu Jun 5 16:34:18 MDT 2008


On Thu, Jun 5, 2008 at 4:17 PM, Andrew McNabb <amcnabb at mcnabbs.org> wrote:
> That can be tough, though.  You can't always control reverse DNS for any
> client that might connect.  Even if it's your computer that's
> connecting, cable modem companies and ISPs aren't always very
> DNS-friendly.

I didn't say the DNS record has to be anything specific, it just has to exist.
Almost all ISPs have a reverse DNS record for every IP, they commonly
indicate the type or location of the address.
Case in point (comcast):
176.175.0.24.in-addr.arpa domain name pointer
c-24-0-175-176.hsd1.tx.comcast.net.

The problem arises usually when a private address is used where no
reverse DNS zone is served at all.
This means you either need to synchronize a complete hosts list to all
machines, or run your own internal DNS server.



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