On Mon, 5 Mar 2018 11:43:48 +0700
Eko Budiharto <eko.budiha...@gmail.com> wrote:

> dear all,
> 
> I am trying to put a captcha on my site. I already have public key
> and secret key from google. I already put the public key on my html
> and secret key on the server respond site. But when I ran it, I got
> an error, For security reasons, you must pass the remote ip to
> reCAPTCHA at respond.pl line 66.
> 
> the CPAN library used is
> 
> Captcha::reCAPTCHA;
> 
> 
> the line 66 (respond.pl) is
> 
> my $result = $c->check_answer(
>      "xxx123", $ENV{'REMOTE_ADDR'},
>      \$challenge, $response
> );

One would assume that $ENV{'REMOTE_ADDR'} is empty, but you haven't
mentioned how you're actually running the code in question, so it's
hard to tell you why / how to get it.

So - how are you running this code? 

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