# External Basic Authentication - NGINX Ingress Controller

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# External Basic Authentication

### Example 1:

Use an external service (Basic Auth) located in `https://httpbin.org`

    $ kubectl create -f ingress.yaml
    ingress "external-auth" created

    $ kubectl get ing external-auth
    NAME            HOSTS                         ADDRESS       PORTS     AGE
    external-auth   external-auth-01.sample.com   172.17.4.99   80        13s

    $ kubectl get ing external-auth -o yaml
    apiVersion: networking.k8s.io/v1beta1
    kind: Ingress
    metadata:
      annotations:
        nginx.ingress.kubernetes.io/auth-url: https://httpbin.org/basic-auth/user/passwd
      creationTimestamp: 2016-10-03T13:50:35Z
      generation: 1
      name: external-auth
      namespace: default
      resourceVersion: "2068378"
      selfLink: /apis/networking/v1beta1/namespaces/default/ingresses/external-auth
      uid: 5c388f1d-8970-11e6-9004-080027d2dc94
    spec:
      rules:
      - host: external-auth-01.sample.com
        http:
          paths:
          - backend:
              serviceName: http-svc
              servicePort: 80
            path: /
    status:
      loadBalancer:
        ingress:
        - ip: 172.17.4.99
    $

Test 1: no username/password (expect code 401)

    $ curl -k http://172.17.4.99 -v -H 'Host: external-auth-01.sample.com'
    * Rebuilt URL to: http://172.17.4.99/
    *   Trying 172.17.4.99...
    * Connected to 172.17.4.99 (172.17.4.99) port 80 (#0)
    > GET / HTTP/1.1
    > Host: external-auth-01.sample.com
    > User-Agent: curl/7.50.1
    > Accept: */*
    >
    < HTTP/1.1 401 Unauthorized
    < Server: nginx/1.11.3
    < Date: Mon, 03 Oct 2016 14:52:08 GMT
    < Content-Type: text/html
    < Content-Length: 195
    < Connection: keep-alive
    < WWW-Authenticate: Basic realm="Fake Realm"
    <
    <html>
    <head><title>401 Authorization Required</title></head>
    <body bgcolor="white">
    <center><h1>401 Authorization Required</h1></center>
    <hr><center>nginx/1.11.3</center>
    </body>
    </html>
    * Connection #0 to host 172.17.4.99 left intact

Test 2: valid username/password (expect code 200)

    $ curl -k http://172.17.4.99 -v -H 'Host: external-auth-01.sample.com' -u 'user:passwd'
    * Rebuilt URL to: http://172.17.4.99/
    *   Trying 172.17.4.99...
    * Connected to 172.17.4.99 (172.17.4.99) port 80 (#0)
    * Server auth using Basic with user 'user'
    > GET / HTTP/1.1
    > Host: external-auth-01.sample.com
    > Authorization: Basic dXNlcjpwYXNzd2Q=
    > User-Agent: curl/7.50.1
    > Accept: */*
    >
    < HTTP/1.1 200 OK
    < Server: nginx/1.11.3
    < Date: Mon, 03 Oct 2016 14:52:50 GMT
    < Content-Type: text/plain
    < Transfer-Encoding: chunked
    < Connection: keep-alive
    <
    CLIENT VALUES:
    client_address=10.2.60.2
    command=GET
    real path=/
    query=nil
    request_version=1.1
    request_uri=http://external-auth-01.sample.com:8080/

    SERVER VALUES:
    server_version=nginx: 1.9.11 - lua: 10001

    HEADERS RECEIVED:
    accept=*/*
    authorization=Basic dXNlcjpwYXNzd2Q=
    connection=close
    host=external-auth-01.sample.com
    user-agent=curl/7.50.1
    x-forwarded-for=10.2.60.1
    x-forwarded-host=external-auth-01.sample.com
    x-forwarded-port=80
    x-forwarded-proto=http
    x-real-ip=10.2.60.1
    BODY:
    * Connection #0 to host 172.17.4.99 left intact
    -no body in request-

Test 3: invalid username/password (expect code 401)

    curl -k http://172.17.4.99 -v -H 'Host: external-auth-01.sample.com' -u 'user:user'
    * Rebuilt URL to: http://172.17.4.99/
    *   Trying 172.17.4.99...
    * Connected to 172.17.4.99 (172.17.4.99) port 80 (#0)
    * Server auth using Basic with user 'user'
    > GET / HTTP/1.1
    > Host: external-auth-01.sample.com
    > Authorization: Basic dXNlcjp1c2Vy
    > User-Agent: curl/7.50.1
    > Accept: */*
    >
    < HTTP/1.1 401 Unauthorized
    < Server: nginx/1.11.3
    < Date: Mon, 03 Oct 2016 14:53:04 GMT
    < Content-Type: text/html
    < Content-Length: 195
    < Connection: keep-alive
    * Authentication problem. Ignoring this.
    < WWW-Authenticate: Basic realm="Fake Realm"
    <
    <html>
    <head><title>401 Authorization Required</title></head>
    <body bgcolor="white">
    <center><h1>401 Authorization Required</h1></center>
    <hr><center>nginx/1.11.3</center>
    </body>
    </html>
    * Connection #0 to host 172.17.4.99 left intact