getting IP address of router

[jim ruxton]

Hi David,
Thanks a lot for the info.Nice to hear from you. I'll probably use
someone like dyndns.org eventually but just fooling around now and yes
what you described is what I'm trying to do. I think I'll write
something that parses the output of   
# wget myip.dk 
Shouldn't be too difficult.
jim
> Hey,
> 
>  I used to keep a few websites up and running on "unlimited dialup"
> accounts. The classic problem was that the ip address would change. Here's
> how I got around it. I'd keep the link to the websites up on a website
> with a permanent hostname etc. Back inside my LAN I ran a cronjob to check
> my ip address and when I'd find that it changed I'd ftp up the new link.
> 
>  We used to call this a "pirate" website ... somehow like the pirate radio
> stations that float around in ships and ...
> 
> Step1:
> 
>  Place a simple cgi script up on some permanent well-known website you
> have access to. You can call that script and have it return back to you
> the ip address of your router.
> 
>  That script need only contain:
> 
> #!/usr/bin/perl
> print "Content-type: text/html\n\n$ENV{'REMOTE_ADDR'}";
> 
> Step2:
> 
>  Call that script using "wget" or "lynx". Here's an example but you'd want
> to format the output from the cgi script to be something you are
> comfortable with parsing. I have used both Lynx and wget for
> automated/cron retrieval of stuff ... I prefer wget these days...
> 
> wget http://www.specstock.com/cgi-bin/ip.cgi
> 
> Regards,
> 
> =========================================================
> | David Mayerlen
> | Upstart Associates
> | http://www.upstartx.com
> | dmz-yBkl/NpmZwtWk0Htik3J/w at public.gmane.org
> | 416-424-6739
> =========================================================
> 
> On Mon, 7 Feb 2005, jim ruxton wrote:
> 
> > On Mon, 2005-02-07 at 16:22, Peter L. Peres wrote:
> > > On Mon, 7 Feb 2005, jim ruxton wrote:
> > >
> > > > Thanks again Adam. I didn't have Lynx, guess it doesn't come with
> > > > Fedora. I installed it and this works, thanks. What I'd like to easily
> > > > be able to do is grab my internet IP address and pass it on to a script.
> > > > I guess I could parse what comes back from myip.dk but I keep thinking
> > > > there must be an easier way.
> > >
> > > What system are you on ? On linux you don't need an external host to
> > > tell you who you are unless you run through a NAT firewall atyour
> > > premises or your isp's.
> > >
> > > Both lynx and, better, wget, can be used to obtain the source of a web
> > > page. wget is easier to use than lynx in this context.
> > >
> > > Is that host behind a NAT firewall ?
> >
> > Yes that is my problem. I am behind the NAT firewall.
> > Jim
> > >
> > > Peter
> > > --
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> >
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--
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TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://tlug.ss.org/subscribe.shtml