56 Received HTTP code 403 from proxy after CONNECT?

Question

I am getting a "56 Received HTTP code 403 from proxy after CONNECT" Error while generating a lead to salesforce using cUrl from my web page. SSL certificate of the site is already expired.

my code is as follows:

 curl_setopt($curl, CURLOPT_URL, $_url);

  curl_setopt($curl, CURLOPT_POST, count($field));

  curl_setopt($curl, CURLOPT_POSTFIELDS, $query_data);

  curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);

  curl_setopt($curl, CURLOPT_HEADER, 1);

  curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);

  curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);

  curl_setopt($curl, CURLOPT_USERAGENT, "cusom module");

Answer 1

Add

AllowCONNECT port[-port] [port[-port]] ...

below ProxyRequests On in httpd_proxy.conf of apache proxy

eg:

ProxyRequests On

AllowCONNECT 443 563 5000

5000 is port of destination address.

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