Hi, first of all i'am a complete beginner, like i have never use something like elasticsearch before.
I'm on a ubuntu 16.04 Xenial server behind a corporate proxy.
So i have followed this tutorial:
how to install elasticsearch on a ubuntu16.04 but in french  
i'm afraid that no english version exist, but the command are explicit
and when i try this command:
curl -XPUT "http://localhost:9200/movies/movie/1" -d'
{
    "title": "The Godfather",
    "director": "Francis Ford Coppola",
    "year": 1972
}'
I get this monstruosity:
<html>
	<head>
		<meta type="copyright" content="">
		<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
		<title>ERREUR : l'URL demandée n'a pas pu être chargée</title>
		<style type="text/css"><!--
		 /*
		 * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
		 *
		 * Squid software is distributed under GPLv2+ license and includes
		 * contributions from numerous individuals and organizations.
		 * Please see the COPYING and CONTRIBUTORS files for details.
		 */
		/*
		 Stylesheet for Squid Error pages
		 Adapted from design by Free CSS Templates
		 http://www.freecsstemplates.org
		 Released for free under a Creative Commons Attribution 2.5 License
		*/
		/* Page basics */
		* {
		        font-family: verdana, sans-serif;
		}
		html body {
		        margin: 0;
		        padding: 0;
		        background: #efefef;
		        font-size: 12px;
		        color: #1e1e1e;
		}
		/* Page displayed title area */
		#titles {
		        margin-left: 15px;
		        padding: 10px;
		        padding-left: 100px;
		        background: url('/squid-internal-static/icons/SN.png') no-repeat left;
		}
		/* initial title */
		#titles h1 {
		        color: #000000;
		}
		#titles h2 {
		        color: #000000;
		}
		/* special event: FTP success page titles */
		#titles ftpsuccess {
		        background-color:#00ff00;
		        width:100%;
		}
		/* Page displayed body content area */
		#content {
		        padding: 10px;
		        background: #ffffff;
		}
		/* General text */
		p {
		}
		/* error brief description */
		#error p {
		}
		/* some data which may have caused the problem */
		#data {
		}
		/* the error message received from the system or other software */
		#sysmsg {
		}
		pre {
		    font-family:sans-serif;
		}
		/* special event: FTP / Gopher directory listing */
		#dirmsg {
		    font-family: courier;
		    color: black;
		    font-size: 10pt;
		}
		#dirlisting {
		    margin-left: 2%;
		    margin-right: 2%;
		}
		#dirlisting tr.entry td.icon,td.filename,td.size,td.date {
		    border-bottom: groove;
		}
		#dirlisting td.size {
		    width: 50px;
		    text-align: right;
		    padding-right: 5px;
		}
		/* horizontal lines */
		hr {
		        margin: 0;
		}
		/* page displayed footer area */
		#footer {
		        font-size: 9px;
		        padding-left: 10px;
		}
		body
		:lang(fa) { direction: rtl; font-size: 100%; font-family: Tahoma, Roya, sans-serif; float: right; }
		:lang(he) { direction: rtl; }
		 --></style>
	</head>
	<body id="ERR_CONNECT_FAIL">
		<div id="titles">
		<h1>ERREUR</h1>
		<h2>L'URL demandée n'a pas pu être trouvé</h2>
		</div>
		<hr>
		<div id="content">
		<p>L'erreur suivante s'est produite en essayant d'accéder à l'URL : <a href="http://localhost:9200/tutorial/helloworld/1">http://localhost:9200/tutorial/helloworld/1</a></p>
		<blockquote id="error">
		<p><b>La connexion ::1 a échouée.</b></p>
		</blockquote>
		<p id="sysmsg">Le système a retourné : <i>(111) Connection refused</i></p>
		<p>L'hôte distant ou le réseau sont peut-être défaillant. Veuillez renouveler votre requête.</p>
		<p>Votre administrateur proxy est <a href="mailto:informatique@ch-avranches-granville.fr?subject=CacheErrorInfo%20-%20ERR_CONNECT_FAIL&body=CacheHost%3A%20proxy-squid-avr%0D%0AErrPage%3A%20ERR_CONNECT_FAIL%0D%0AErr%3A%20(111)%20Connection%20refused%0D%0ATimeStamp%3A%20Wed,%2026%20Jun%202019%2007%3A52%3A22%20GMT%0D%0A%0D%0AClientIP%3A%2010.50.40.157%0D%0AServerIP%3A%20localhost%0D%0A%0D%0AHTTP%20Request%3A%0D%0APOST%20%2Ftutorial%2Fhelloworld%2F1%20HTTP%2F1.1%0AProxy-Authorization%3A%20Basic%20cDA5MDk6R2xvcGU0%0D%0AUser-Agent%3A%20curl%2F7.47.0%0D%0AAccept%3A%20*%2F*%0D%0AProxy-Connection%3A%20Keep-Alive%0D%0AContent-Length%3A%2029%0D%0AContent-Type%3A%20application%2Fx-www-form-urlencoded%0D%0AHost%3A%20localhost%3A9200%0D%0A%0D%0A%0D%0A">informatique@ch-avranches-granville.fr</a>.</p>
		<br>
		</div>
		<hr>
		<div id="footer">
		<p>Générée le Wed, 26 Jun 2019 07:52:22 GMT par proxy-squid-avr (squid/3.5.27)</p>
		<!-- ERR_CONNECT_FAIL -->
		</div>
	</body>
</html>
but twice in the same error message.
The same error message but in the firefox way:
Sorry it's in french but you get the idea.
So if you can help me, this will made my day, jeebus be with y'all.
Busan

