On 11/10/05, Lan Barnes <[EMAIL PROTECTED]> wrote:
> On Tue, Nov 08, 2005 at 12:19:28PM -0800, Ralph Shumaker wrote:
> > Todd Walton wrote:
> >
> > >A simpler way of doing it (maybe) is simply to use her IP address. In
> > >this case you'd use a command like "ssh [EMAIL PROTECTED]", if
> > >69.239.117.25 were her IP address. The IP address will be different
> > >every time she gets online. A way to find out what it is is to have
> > >her go to http://whatismyip.com/ . Try it yourself right now. That
> > >tells you what IP address you are visiting the website from, i.e. that
> > >is your IP. When she goes to that website she'll see *her* IP. Then
> > >she can either call you and tell you it, or send you an email with it.
> > >(There's no security risk with sending it through the email.)
> > >
> > >
> >
> > Is there a way to have her computer automaticly send me an email if her
> > IP address has changed? I think it tends to *not* change very often
> > since she is on Cox.
> >
>
> I'm seeing a perl cron job that runs /sbin/ifconfig at intervals, parses
> the outside ethX card's IP addr, compares it to a addr stored in a file,
> and writes a new file and sends email if changed.
Only works if your "outside ethX card" is part of the system on which
you run /sbin/ifconfig. If it is part of an external
router/NAT/firewall box, you can't get there from here. It's possible
to interact with the management software of the external box to find
out what IP address has been given to it by your cable modem, etc. I
once made a script that did that for my Linksys BEFW11S4. But letting
"whatismyip.com" do it for you seems easier.
carl
--
carl lowenstein marine physical lab u.c. san diego
[EMAIL PROTECTED]
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