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Subject: Re: [gentoo-user] Internet providers' IP range (xinetd.conf)
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On Wed, Sep 2, 2009 at 9:11 AM, Helmut Jarausch<jarausch@skynet.be> wrote:
> Hi,
>
> I'd like to allow remote access (via ssh only) to a given machine.
> Unfortunately, my remote IP is dynamic and reverse lookup
> (e.g. specifying only_from = .skynet.be in /etc/xinetd.conf) doesn't work.
> So, I have to find out which IP ranges are used by a given
> internet provider (e.g. skynet.be).
>
> Does anybody know how to find out?
>
> Many thanks for a hint,
> Helmut.

Easiest way: ask them to tell you the ranges :) Otherwise would be
guessing. You can look at arin (or local equivalent) to see which IP
range(s) they own. But nobody knows for sure other than them.