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I have some trouble with Nginx and Jenkins (Hudson). I am trying to use Nginx as Reverse Proxy for the Jenkins instance with HTTP Basic Authentication.

It works so far, but i have no idea how to pass the Header with the Authentication Username.

location / {
  auth_basic "Restricted";
  auth_basic_user_file /usr/share/nginx/.htpasswd;
  sendfile off;

  proxy_pass         http://192.168.178.102:8080;
  proxy_redirect     default;
  proxy_set_header   Host             $http_host;
  proxy_set_header   X-Real-IP        $remote_addr;
  proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
  proxy_set_header   X-Forwarded-User $http_authorization; 
  proxy_max_temp_file_size 0;

  #this is the maximum upload size
  client_max_body_size       10m;
  client_body_buffer_size    128k;

  proxy_connect_timeout      90;
  proxy_send_timeout         90;
  proxy_read_timeout         90;             
  proxy_buffer_size          4k;
  proxy_buffers              4 32k;
  proxy_busy_buffers_size    64k;
  proxy_temp_file_write_size 64k;
}
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1
  • 1
    Note you probably want an extra 'd' in "X-Forwared-User".
    – Paul
    Commented Jan 29, 2015 at 16:44

2 Answers 2

Reset to default
30

Try adding this directives to your location block

proxy_set_header Authorization $http_authorization;
proxy_pass_header  Authorization;
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7
  • This header is passing: Username: Basic YXJuZTpraWxsZXI, not the correct name from http auth (;
    – opHASnoNAME
    Commented May 29, 2013 at 17:32
  • 7
    This must be base64 encoded string en.wikipedia.org/wiki/Basic_access_authentication#cite_note-8 try to decoding it
    – Andrei Mikhaltsov
    Commented May 31, 2013 at 13:11
  • Authorization header must be base64 encoded header, yes. But that is not what the question is about. The question is about passing auth username in headers, not full authorization header.
    – Olli
    Commented Apr 2, 2018 at 13:37
  • 2
    YXJuZTpraWxsZXI decodes to arne:killer - nice example @opHASnoNAME :-)
    – Enda Farrell
    Commented Jul 24, 2019 at 15:51
  • 1
    pass_header and set_header...? isn't this two times more or less the same effect? Both should work, shouldn't it?
    – phip1611
    Commented Nov 28, 2019 at 16:40
11

To get this to work with Jenkins reverse proxy auth plugin:

proxy_set_header Authorization "";
proxy_set_header X-Forwarded-User $remote_user;

If you don't reset Authorization header, nginx will forward that by default, and when enabling reverse proxy auth plugin, Jenkins (jetty) will try to re-authenticate the user, and fails on that.

nginx version 1.12.1, Jenkins 2.113.

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  • 1
    THANK YOU! This is exactly what I was looking for. MUCH appreciated.
    – Erutan409
    Commented Jan 6, 2019 at 19:34

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