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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Just did a bit more digging. You should be able to override nginx’s own internal variables using the “set” configuration directive, so if you’re not using FastCGI,
you should still be able to do this:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> set $remote_user $http_remote_user;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">(All variables that begin with “$http_” are from the HTTP headers collection.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Todd<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> users <users-bounces@shibboleth.net>
<b>On Behalf Of </b>Boyd, Todd M.<br>
<b>Sent:</b> Wednesday, July 18, 2018 3:58 PM<br>
<b>To:</b> Shib Users <users@shibboleth.net><br>
<b>Subject:</b> [Suspected Spam]RE: Can't find attribute REMOTE_USER value in https request<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">It kind of depends how the application is being spawned. If it’s by FastCGI, you should be able to use the “fastcgi_param” configuration directive to set a server
variable, like this:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"> fastcgi_param REMOTE_USER $http_remote_user;<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Todd<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> users <<a href="mailto:users-bounces@shibboleth.net">users-bounces@shibboleth.net</a>>
<b>On Behalf Of </b>Christopher Bongaarts<br>
<b>Sent:</b> Wednesday, July 18, 2018 2:29 PM<br>
<b>To:</b> Shib Users <<a href="mailto:users@shibboleth.net">users@shibboleth.net</a>>; Tony Ennis <<a href="mailto:tennis@eagle6.com">tennis@eagle6.com</a>><br>
<b>Subject:</b> Re: Can't find attribute REMOTE_USER value in https request<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">On 7/18/2018 9:33 AM, Tony Ennis wrote:<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Segoe UI",sans-serif;color:#212121">>> My nginx-powered endpoint checks for a Shib cookie and if not<br>
>> present in the http request, redirects to the Shib login.</span><o:p></o:p></p>
</blockquote>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
If you're reverse proxying from httpd to nginx, then no, you won't get REMOTE_USER set. You'd need to use headers instead of environment variables (not the default) and pull the particular value you want.<br>
<br>
It might be possible to have nginx map an incoming header value to REMOTE_USER, but I don't know much on the nginx side.<br>
<br>
<o:p></o:p></p>
<pre>-- <o:p></o:p></pre>
<pre>%% Christopher A. Bongaarts %% <a href="mailto:cab@umn.edu">cab@umn.edu</a> %%<o:p></o:p></pre>
<pre>%% OIT - Identity Management %% <a href="http://umn.edu/~cab">http://umn.edu/~cab</a> %%<o:p></o:p></pre>
<pre>%% University of Minnesota %% +1 (612) 625-1809 %%<o:p></o:p></pre>
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