The only thing I can think of is to use something like "http://www.dyndns.org/cgi-bin/check_ip.cgi" others may have a be

NSUInteger  an_Integer;
NSArray* ipItemsArray;
NSString*externalIP;

NSURL
*iPURL =[NSURL URLWithString:@"http://www.dyndns.org/cgi-bin/check_ip.cgi"];

if(iPURL){
   
NSError*error = nil;
   
NSString*theIpHtml =[NSString stringWithContentsOfURL:iPURL
                                                  encoding
:NSUTF8StringEncoding
                                                     error
:&error];
   
if(!error){
               
NSScanner*theScanner;
       
NSString*text = nil;

        theScanner
=[NSScanner scannerWithString:theIpHtml];

       
while([theScanner isAtEnd]== NO){

               
// find start of tag
           
[theScanner scanUpToString:@"<" intoString:NULL];

               
// find end of tag
           
[theScanner scanUpToString:@">" intoString:&text];

               
// replace the found tag with a space
               
//(you can filter multi-spaces out later if you wish)
            theIpHtml
=[theIpHtml stringByReplacingOccurrencesOfString:
                   
[NSString stringWithFormat:@"%@>", text]
                                                   withString
:@" "];
            ipItemsArray
=[theIpHtml  componentsSeparatedByString:@" "];
            an_Integer
=[ipItemsArray indexOfObject:@"Address:"];

                externalIP
=[ipItemsArray objectAtIndex:  ++an_Integer];



       
}


           
NSLog(@"%@",externalIP);
   
}else{
       
NSLog(@"Oops... g %d, %@",
             
[error code],
             
[error localizedDescription]);
   
}
}




[pool drain];
return0;

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