<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 14 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor="white" lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">add_header is used to add a header to a
<i>response</i>. It’s not entirely clear to me that that’s what you want to do. But if so, add_header won’t run for non-200 return values by default. If you want to propagate the header for error conditions add the “always” option:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-indent:.5in"><span style="font-size:11.0pt">add_header X-Origin-Forwarded-For $remote_addr
<b><span style="background:yellow;mso-highlight:yellow">always</span></b>;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">But this still feels weird to me so maybe I am missing something. Why would you want to add that header to the response (other than for debugging)? The equivalent proxy_set_header (line 4 in your example)
seems like all you should need to me.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Jason<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> nginx [mailto:nginx-bounces@nginx.org]
<b>On Behalf Of </b>Friscia, Michael<br>
<b>Sent:</b> Thursday, March 15, 2018 3:04 PM<br>
<b>To:</b> nginx@nginx.org<br>
<b>Subject:</b> [IE] Proxy requests that return a 403 error - issue with sending headers<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I hope I can explain this well enough to understand what I’m doing wrong.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The problem I am trying to solve is that I am making proxy requests to a site that has IP restrictions. Nginx is making a request to another Proxy URL rewrite server we use which then makes the request to
the web application. So what happens without any work is that the second proxy server is making the request with the Nginx server IP address. So we made some changes to headers in Nginx to pass the client IP and then it would forward through the second proxy,
make it to the web app and process the IP restriction. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have a block in my global settings that offers these header additions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">add_header X-Origin-Forwarded-For $remote_addr;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">proxy_set_header X-Forwarded-Server $hostname;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">proxy_set_header X-Origin-Forwarded-For $remote_addr;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">proxy_set_header Accept-Encoding identity;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">It’s really the X-Origin… that I care about. But what seems to be happening is that for any normal request, the client IP address is being passed to the web app but when I make the request for a page that
returns the 403 error because of the IP restriction, none of the headers above are being applied to the request. So the web app is never getting passed my custom headers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">My question is if there is some sort of setting I am missing and I ask that making an assumption that the problem is that Nginx is making a request without sending headers, getting the 403 error and then all
processing stops and I just get an access denied page.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Any thoughts on how to handle this problem would be appreciated. I’ve tried numerous things and the root of the problem seems to be that Nginx is not making the full request. My next assumption is that this
global configuration is to blame by having “error” in the list<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">proxy_cache_use_stale error timeout updating invalid_header http_500 http_502 http_503 http_504;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">-mike<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A">___________________________________________<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A">Michael Friscia<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A">Office of Communications<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A">Yale School of Medicine<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A">(203) 737-7932 - office<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A">(203) 931-5381 - mobile<o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:10.0pt;color:#44546A"><a href="http://web.yale.edu/"><span style="color:#44546A">http://web.yale.edu</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
This message contains proprietary information from Equifax which may be confidential. If you are not an intended recipient, please refrain from any disclosure, copying, distribution or use of this information and note that such actions are prohibited. If you
have received this transmission in error, please notify by e-mail postmaster@equifax.com. Equifax® is a registered trademark of Equifax Inc. All rights reserved.
</body>
</html>