Get External IP Address

gistfile1.m

+ (void)getExternalIP{
    NSURLRequest *ipRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://checkip.dyndns.com"]];
    NSURLResponse *ipResponse = nil;
    NSError *ipError = nil;
    NSData *ipData = [NSURLConnection sendSynchronousRequest:ipRequest
                                                          returningResponse:&ipResponse
                                                                      error:&ipError];
    NSString *ipInfo = [[[NSString alloc] initWithData:ipData encoding:NSUTF8StringEncoding] autorelease];
    NSLog(@"ipInfo %@", ipInfo);
}