`oauth2-proxy` can be configured via [config file](#config-file), [command line options](#command-line-options) or [environment variables](#environment-variables).
Every command line argument can be specified in a config file by replacing hyphens (-) with underscores (\_). If the argument can be specified multiple times, the config option should be plural (trailing s).
An example [oauth2-proxy.cfg](https://github.com/oauth2-proxy/oauth2-proxy/blob/master/contrib/oauth2-proxy.cfg.example) config file is in the contrib directory. It can be used by specifying `--config=/etc/oauth2-proxy.cfg`
| `--client-secret-file` | string | the file with OAuth Client Secret | |
| `--config` | string | path to config file | |
| `--cookie-domain` | string \| list | Optional cookie domains to force cookies to (e.g. `.yourcompany.com`). The longest domain matching the request's host will be used (or the shortest cookie domain if there is no match). | |
| `--cookie-samesite` | string | set SameSite cookie attribute (`"lax"`, `"strict"`, `"none"`, or `""`). | `""` |
| `--custom-templates-dir` | string | path to custom html templates | |
| `--display-htpasswd-form` | bool | display username / password login form if an htpasswd file is provided | true |
| `--email-domain` | string \| list | authenticate emails with the specified domain (may be given multiple times). Use `*` to authenticate any email | |
| `--errors-to-info-log` | bool | redirects error-level logging to default log channel instead of stderr | |
| `--extra-jwt-issuers` | string | if `--skip-jwt-bearer-tokens` is set, a list of extra JWT `issuer=audience` (see a token's `iss`, `aud` fields) pairs (where the issuer URL has a `.well-known/openid-configuration` or a `.well-known/jwks.json`) | |
| `--banner` | string | custom (html) banner string. Use `"-"` to disable default banner. | |
| `--footer` | string | custom (html) footer string. Use `"-"` to disable default footer. | |
| `--gcp-healthchecks` | bool | will enable `/liveness_check`, `/readiness_check`, and `/` (with the proper user-agent) endpoints that will make it work well with GCP App Engine and GKE Ingresses | false |
| `--github-org` | string | restrict logins to members of this organisation | |
| `--github-team` | string | restrict logins to members of any of these teams (slug), separated by a comma | |
| `--github-repo` | string | restrict logins to collaborators of this repository formatted as `orgname/repo` | |
| `--github-token` | string | the token to use when verifying repository collaborators (must have push access to the repository) | |
| `--github-user` | string \| list | To allow users to login by username even if they do not belong to the specified org and team or collaborators | |
| `--gitlab-group` | string \| list | restrict logins to members of any of these groups (slug), separated by a comma | |
| `--google-admin-email` | string | the google admin to impersonate for api calls | |
| `--google-group` | string | restrict logins to members of this google group (may be given multiple times). | |
| `--google-service-account-json` | string | the path to the service account json credentials | |
| `--htpasswd-file` | string | additionally authenticate against a htpasswd file. Entries must be created with `htpasswd -s` for SHA encryption | |
| `--http-address` | string | `[http://]<addr>:<port>` or `unix://<path>` to listen on for HTTP clients | `"127.0.0.1:4180"` |
| `--https-address` | string | `<addr>:<port>` to listen on for HTTPS clients | `":443"` |
| `--logging-compress` | bool | Should rotated log files be compressed using gzip | false |
| `--logging-filename` | string | File to log requests to, empty for `stdout` | `""` (stdout) |
| `--logging-local-time` | bool | Use local time in log files and backup filenames instead of UTC | true (local time) |
| `--logging-max-age` | int | Maximum number of days to retain old log files | 7 |
| `--logging-max-backups` | int | Maximum number of old log files to retain; 0 to disable | 0 |
| `--logging-max-size` | int | Maximum size in megabytes of the log file before rotation | 100 |
| `--jwt-key` | string | private key in PEM format used to sign JWT, so that you can say something like `--jwt-key="${OAUTH2_PROXY_JWT_KEY}"`: required by login.gov | |
| `--jwt-key-file` | string | path to the private key file in PEM format used to sign the JWT so that you can say something like `--jwt-key-file=/etc/ssl/private/jwt_signing_key.pem`: required by login.gov | |
| `--insecure-oidc-allow-unverified-email` | bool | don't fail if an email address in an id_token is not verified | false |
| `--insecure-oidc-skip-issuer-verification` | bool | allow the OIDC issuer URL to differ from the expected (currently required for Azure multi-tenant compatibility) | false |
| `--oidc-issuer-url` | string | the OpenID Connect issuer URL, e.g. `"https://accounts.google.com"` | |
| `--oidc-jwks-url` | string | OIDC JWKS URI for token verification; required if OIDC discovery is disabled | |
| `--pass-access-token` | bool | pass OAuth access_token to upstream via X-Forwarded-Access-Token header. When used with `--set-xauthrequest` this adds the X-Auth-Request-Access-Token header to the response | false |
| `--pass-authorization-header` | bool | pass OIDC IDToken to upstream via Authorization Bearer header | false |
| `--pass-basic-auth` | bool | pass HTTP Basic Auth, X-Forwarded-User, X-Forwarded-Email and X-Forwarded-Preferred-Username information to upstream | true |
| `--prefer-email-to-user` | bool | Prefer to use the Email address as the Username when passing information to upstream. Will only use Username if Email is unavailable, e.g. htaccess authentication. Used in conjunction with `--pass-basic-auth` and `--pass-user-headers` | false |
| `--pass-host-header` | bool | pass the request Host Header to upstream | true |
| `--pass-user-headers` | bool | pass X-Forwarded-User, X-Forwarded-Email and X-Forwarded-Preferred-Username information to upstream | true |
| `--prompt` | string | [OIDC prompt](https://openid.net/specs/openid-connect-core-1_0.html#AuthRequest); if present, `approval-prompt` is ignored | `""` |
| `--provider` | string | OAuth provider | google |
| `--provider-ca-file` | string \| list | Paths to CA certificates that should be used when connecting to the provider. If not specified, the default Go trust sources are used instead. |
| `--provider-display-name` | string | Override the provider's name with the given string; used for the sign-in page | (depends on provider) |
| `--ping-path` | string | the ping endpoint that can be used for basic health checks | `"/ping"` |
| `--ping-user-agent` | string | a User-Agent that can be used for basic health checks | `""` (don't check user agent) |
| `--proxy-prefix` | string | the url root path that this proxy should be nested under (e.g. /`<oauth2>/sign_in`) | `"/oauth2"` |
| `--real-client-ip-header` | string | Header used to determine the real IP of the client, requires `--reverse-proxy` to be set (one of: X-Forwarded-For, X-Real-IP, or X-ProxyUser-IP) | X-Real-IP |
| `--redirect-url` | string | the OAuth Redirect URL, e.g. `"https://internalapp.yourcompany.com/oauth2/callback"` | |
| `--redis-cluster-connection-urls` | string \| list | List of Redis cluster connection URLs (e.g. `redis://HOST[:PORT]`). Used in conjunction with `--redis-use-cluster` | |
| `--redis-connection-url` | string | URL of redis server for redis session storage (e.g. `redis://HOST[:PORT]`) | |
| `--redis-password` | string | Redis password. Applicable for all Redis configurations. Will override any password set in `--redis-connection-url` | |
| `--redis-sentinel-password` | string | Redis sentinel password. Used only for sentinel connection; any redis node passwords need to use `--redis-password` | |
| `--redis-sentinel-master-name` | string | Redis sentinel master name. Used in conjunction with `--redis-use-sentinel` | |
| `--redis-sentinel-connection-urls` | string \| list | List of Redis sentinel connection URLs (e.g. `redis://HOST[:PORT]`). Used in conjunction with `--redis-use-sentinel` | |
| `--redis-use-cluster` | bool | Connect to redis cluster. Must set `--redis-cluster-connection-urls` to use this feature | false |
| `--redis-use-sentinel` | bool | Connect to redis via sentinels. Must set `--redis-sentinel-master-name` and `--redis-sentinel-connection-urls` to use this feature | false |
| `--session-cookie-minimal` | bool | strip OAuth tokens from cookie session stores if they aren't needed (cookie session store only) | false |
| `--session-store-type` | string | [Session data storage backend](sessions.md); redis or cookie | cookie |
| `--set-xauthrequest` | bool | set X-Auth-Request-User, X-Auth-Request-Email and X-Auth-Request-Preferred-Username response headers (useful in Nginx auth_request mode). When used with `--pass-access-token`, X-Auth-Request-Access-Token is added to response headers. | false |
| `--set-authorization-header` | bool | set Authorization Bearer response header (useful in Nginx auth_request mode) | false |
| `--set-basic-auth` | bool | set HTTP Basic Auth information in response (useful in Nginx auth_request mode) | false |
| `--silence-ping-logging` | bool | disable logging of requests to ping endpoint | false |
| `--skip-auth-preflight` | bool | will skip authentication for OPTIONS requests | false |
| `--skip-auth-regex` | string | bypass authentication for requests paths that match (may be given multiple times) | |
| `--skip-auth-strip-headers` | bool | strips `X-Forwarded-*` style authentication headers &`Authorization` header if they would be set by oauth2-proxy for request paths in `--skip-auth-regex` | false |
| `--skip-jwt-bearer-tokens` | bool | will skip requests that have verified JWT bearer tokens (the token must have [`aud`](https://en.wikipedia.org/wiki/JSON_Web_Token#Standard_fields) that matches this client id or one of the extras from `extra-jwt-issuers`) | false |
| `--skip-oidc-discovery` | bool | bypass OIDC endpoint discovery. `--login-url`, `--redeem-url` and `--oidc-jwks-url` must be configured in this case | false |
| `--skip-provider-button` | bool | will skip sign-in-page to directly reach the next step: oauth/start | false |
| `--ssl-insecure-skip-verify` | bool | skip validation of certificates presented when using HTTPS providers | false |
| `--ssl-upstream-insecure-skip-verify` | bool | skip validation of certificates presented when using HTTPS upstreams | false |
| `--standard-logging` | bool | Log standard runtime information | true |
| `--standard-logging-format` | string | Template for standard log lines | see [Logging Configuration](#logging-configuration) |
| `--upstream` | string \| list | the http url(s) of the upstream endpoint, file:// paths for static files or `static://<status_code>` for static response. Routing is based on the path | |
| `--user-id-claim` | string | which claim contains the user ID | \["email"\] |
| `--whitelist-domain` | string \| list | allowed domains for redirection after authentication. Prefix domain with a `.` to allow subdomains (e.g. `.example.com`) \[[2](#footnote2)\] | |
| `--trusted-ip` | string \| list | list of IPs or CIDR ranges to allow to bypass authentication (may be given multiple times). When combined with `--reverse-proxy` and optionally `--real-client-ip-header` this will evaluate the trust of the IP stored in an HTTP header by a reverse proxy rather than the layer-3/4 remote address. WARNING: trusting IPs has inherent security flaws, especially when obtaining the IP address from an HTTP header (reverse-proxy mode). Use this option only if you understand the risks and how to manage them. | |
\[<aname="footnote1">1</a>\]: Only these providers support `--cookie-refresh`: GitLab, Google and OIDC
\[<aname="footnote2">2</a>\]: When using the `whitelist-domain` option, any domain prefixed with a `.` will allow any subdomain of the specified domain as a valid redirect URL. By default, only empty ports are allowed. This translates to allowing the default port of the URL's protocol (80 for HTTP, 443 for HTTPS, etc.) since browsers omit them. To allow only a specific port, add it to the whitelisted domain: `example.com:8080`. To allow any port, use `*`: `example.com:*`.
See below for provider specific options
### Upstreams Configuration
`oauth2-proxy` supports having multiple upstreams, and has the option to pass requests on to HTTP(S) servers or serve static files from the file system. HTTP and HTTPS upstreams are configured by providing a URL such as `http://127.0.0.1:8080/` for the upstream parameter. This will forward all authenticated requests to the upstream server. If you instead provide `http://127.0.0.1:8080/some/path/` then it will only be requests that start with `/some/path/` which are forwarded to the upstream.
Static file paths are configured as a file:// URL. `file:///var/www/static/` will serve the files from that directory at `http://[oauth2-proxy url]/var/www/static/`, which may not be what you want. You can provide the path to where the files should be available by adding a fragment to the configured URL. The value of the fragment will then be used to specify which path the files are available at, e.g. `file:///var/www/static/#/static/` will make `/var/www/static/` available at `http://[oauth2-proxy url]/static/`.
Multiple upstreams can either be configured by supplying a comma separated list to the `--upstream` parameter, supplying the parameter multiple times or providing a list in the [config file](#config-file). When multiple upstreams are used routing to them will be based on the path they are set up with.
### Environment variables
Every command line argument can be specified as an environment variable by
prefixing it with `OAUTH2_PROXY_`, capitalising it, and replacing hyphens (`-`)
with underscores (`_`). If the argument can be specified multiple times, the
environment variable should be plural (trailing `S`).
This is particularly useful for storing secrets outside of a configuration file
or the command line.
For example, the `--cookie-secret` flag becomes `OAUTH2_PROXY_COOKIE_SECRET`,
and the `--email-domain` flag becomes `OAUTH2_PROXY_EMAIL_DOMAINS`.
## Logging Configuration
By default, OAuth2 Proxy logs all output to stdout. Logging can be configured to output to a rotating log file using the `--logging-filename` command.
If logging to a file you can also configure the maximum file size (`--logging-max-size`), age (`--logging-max-age`), max backup logs (`--logging-max-backups`), and if backup logs should be compressed (`--logging-compress`).
There are three different types of logging: standard, authentication, and HTTP requests. These can each be enabled or disabled with `--standard-logging`, `--auth-logging`, and `--request-logging`.
Each type of logging has its own configurable format and variables. By default these formats are similar to the Apache Combined Log.
Logging of requests to the `/ping` endpoint (or using `--ping-user-agent`) can be disabled with `--silence-ping-logging` reducing log volume. This flag appends the `--ping-path` to `--exclude-logging-paths`.
### Auth Log Format
Authentication logs are logs which are guaranteed to contain a username or email address of a user attempting to authenticate. These logs are output by default in the below format:
| Client | 74.125.224.72 | The client/remote IP address. Will use the X-Real-IP header it if exists & reverse-proxy is set to true. |
| Host | domain.com | The value of the Host header. |
| Protocol | HTTP/1.0 | The request protocol. |
| RequestDuration | 0.001 | The time in seconds that a request took to process. |
| RequestMethod | GET | The request method. |
| RequestURI | "/oauth2/auth" | The URI path of the request. |
| ResponseSize | 12 | The size in bytes of the response. |
| StatusCode | 200 | The HTTP status code of the response. |
| Timestamp | 19/Mar/2015:17:20:19 -0400 | The date and time of the logging event. |
| Upstream | - | The upstream data of the HTTP request. |
| UserAgent | - | The full user agent as reported by the requesting client. |
| Username | username@email.com | The email or username of the auth request. |
### Standard Log Format
All other logging that is not covered by the above two types of logging will be output in this standard logging format. This includes configuration information at startup and errors that occur outside of a session. The default format is below:
If you require a different format than that, you can configure it with the `--standard-logging-format` flag. The default format is configured as follows:
```
[{{.Timestamp}}] [{{.File}}] {{.Message}}
```
Available variables for standard logging:
| Variable | Example | Description |
| --- | --- | --- |
| Timestamp | 19/Mar/2015:17:20:19 -0400 | The date and time of the logging event. |
| File | main.go:40 | The file and line number of the logging statement. |
| Message | HTTP: listening on 127.0.0.1:4180 | The details of the log statement. |
## Configuring for use with the Nginx `auth_request` directive
The [Nginx `auth_request` directive](http://nginx.org/en/docs/http/ngx_http_auth_request_module.html) allows Nginx to authenticate requests via the oauth2-proxy's `/auth` endpoint, which only returns a 202 Accepted response or a 401 Unauthorized response without proxying the request through. For example:
# Extract the Cookie attributes from the first Set-Cookie header and append them
# to the second part ($upstream_cookie_* variables only contain the raw cookie content)
if ($auth_cookie ~* "(; .*)") {
set $auth_cookie_name_0 $auth_cookie;
set $auth_cookie_name_1 "auth_cookie_name_1=$auth_cookie_name_upstream_1$1";
}
# Send both Set-Cookie headers now if there was a second part
if ($auth_cookie_name_upstream_1) {
add_header Set-Cookie $auth_cookie_name_0;
add_header Set-Cookie $auth_cookie_name_1;
}
proxy_pass http://backend/;
# or "root /path/to/site;" or "fastcgi_pass ..." etc
}
}
```
When you use ingress-nginx in Kubernetes, you MUST use `kubernetes/ingress-nginx` (which includes the Lua module) and the following configuration snippet for your `Ingress`.
Variables set with `auth_request_set` are not `set`-able in plain nginx config when the location is processed via `proxy_pass` and then may only be processed by Lua.
Note that `nginxinc/kubernetes-ingress` does not include the Lua module.
It is recommended to use `--session-store-type=redis` when expecting large sessions/OIDC tokens (_e.g._ with MS Azure).
You have to substitute *name* with the actual cookie name you configured via --cookie-name parameter. If you don't set a custom cookie name the variable should be "$upstream_cookie__oauth2_proxy_1" instead of "$upstream_cookie_name_1" and the new cookie-name should be "_oauth2_proxy_1=" instead of "name_1=".
:::note
If you set up your OAuth2 provider to rotate your client secret, you can use the `client-secret-file` option to reload the secret when it is updated.
