---
layout: default
title: TLS Configuration
permalink: /tls-configuration
nav_order: 4
---

## SSL Configuration

There are two recommended configurations.

1.  Configure SSL Termination with OAuth2 Proxy by providing a `--tls-cert-file=/path/to/cert.pem` and `--tls-key-file=/path/to/cert.key`.

    The command line to run `oauth2_proxy` in this configuration would look like this:

    ```bash
    ./oauth2_proxy \
        --email-domain="yourcompany.com"  \
        --upstream=http://127.0.0.1:8080/ \
        --tls-cert-file=/path/to/cert.pem \
        --tls-key-file=/path/to/cert.key \
        --cookie-secret=... \
        --cookie-secure=true \
        --provider=... \
        --client-id=... \
        --client-secret=...
    ```

2.  Configure SSL Termination with [Nginx](http://nginx.org/) (example config below), Amazon ELB, Google Cloud Platform Load Balancing, or ....

    Because `oauth2_proxy` listens on `127.0.0.1:4180` by default, to listen on all interfaces (needed when using an
    external load balancer like Amazon ELB or Google Platform Load Balancing) use `--http-address="0.0.0.0:4180"` or
    `--http-address="http://:4180"`.

    Nginx will listen on port `443` and handle SSL connections while proxying to `oauth2_proxy` on port `4180`.
    `oauth2_proxy` will then authenticate requests for an upstream application. The external endpoint for this example
    would be `https://internal.yourcompany.com/`.

    An example Nginx config follows. Note the use of `Strict-Transport-Security` header to pin requests to SSL
    via [HSTS](http://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security):

    ```
    server {
        listen 443 default ssl;
        server_name internal.yourcompany.com;
        ssl_certificate /path/to/cert.pem;
        ssl_certificate_key /path/to/cert.key;
        add_header Strict-Transport-Security max-age=2592000;

        location / {
            proxy_pass http://127.0.0.1:4180;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Scheme $scheme;
            proxy_connect_timeout 1;
            proxy_send_timeout 30;
            proxy_read_timeout 30;
        }
    }
    ```

    The command line to run `oauth2_proxy` in this configuration would look like this:

    ```bash
    ./oauth2_proxy \
       --email-domain="yourcompany.com"  \
       --upstream=http://127.0.0.1:8080/ \
       --cookie-secret=... \
       --cookie-secure=true \
       --provider=... \
       --reverse-proxy=true \
       --client-id=... \
       --client-secret=...
    ```