Nginx - Forward HTTP AUTH - User

Question

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;
}

Solution 1

Try adding this directives to your location block

proxy_set_header Authorization $http_authorization;
proxy_pass_header  Authorization;

Solution 2

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.

Comments

[Paul]

Note you probably want an extra 'd' in "X-Forwared-User".

[opHASnoNAME]

This header is passing: Username: Basic YXJuZTpraWxsZXI, not the correct name from http auth (;

[Olli]

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.

[Erutan409]

THANK YOU! This is exactly what I was looking for. MUCH appreciated.

[Enda Farrell]

YXJuZTpraWxsZXI decodes to arne:killer - nice example @opHASnoNAME :-)

[phip1611]

pass_header and set_header...? isn't this two times more or less the same effect? Both should work, shouldn't it?