howto use curl to get Internet IP

[Jim]

Dave Burns wrote:
> On Fri, Jun 6, 2008 at 7:48 AM, Jim <mickeyboa at sbcglobal.net> wrote:
>   
>> I want to use  curl to get my Internet IP address, and getting it to
>> ddclirent.
>> Using  getip.com and dyndns.org to get my IP for ddclient, isn't working
>> out, they shutout  ddclient  after  awhile from getting my Internet IP  to
>> send to dyndns.org .
>> I understand curl can get the Internet IP for ddclient, does anyone know of
>> a  HowTo to show me how to do this ?
>>
>>   
>>     
>
> 1) if you insist on this approach, here's a hint:curl -o - http://getip.com/ 2>/dev/null|grep 128
> Replace 128 with some part of your IP number that you're confident
> will not change. In the example, I used the left 3 digits of my IP
> number. Use sed or awk to scrape off the crud that wget will spew out
> along with the IP number.
>
> 2) why not just use /sbin/ifconfig -a? Your machine knows its own IP
> number as well or better than getip.com.
>
> 3) why not man curl? That is, read the man page of the command you are
> asking about. You don't sound like you've even tried to do your
> homework.
>
> Dave
>
>   
What approach would you suggest that is better to use ?
I have a DSL AP 2Wire783 in front of my  computer that does not have the 
capability of giving me the Internet IP.