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| title | description | lead | date | draft | images | menu | weight | toc | aliases | ||||||
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| Caddy | An integration guide for Authelia and the Caddy reverse proxy | A guide on integrating Authelia with the Caddy reverse proxy. | 2022-06-15T17:51:47+10:00 | false |
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320 | true |
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Caddy is a reverse proxy supported by Authelia.
Authelia offers integration support for the official forward auth integration method Caddy provides, we don't officially support any plugin that supports this though we don't specifically prevent such plugins working and there may be plugins that work fine provided they support the forward authentication specification correctly.
Important: When using these guides it's important to recognize that we cannot provide a guide for every possible method of deploying a proxy. These guides show a suggested setup only and you need to understand the proxy configuration and customize it to your needs. To-that-end we include links to the official proxy documentation throughout this documentation and in the See Also section.
Get Started
It's strongly recommended that users setting up Authelia for the first time take a look at our Get Started guide. This takes you through various steps which are essential to bootstrapping Authelia.
Requirements
You need the following to run Authelia with Caddy:
Trusted Proxies
Important: You should read the Forwarded Headers section and this section as part of any proxy configuration. Especially if you have never read it before.
Important: The included example is NOT meant for production use. It's used expressly as an example to showcase how you can configure multiple IP ranges. You should customize this example to fit your specific architecture and needs. You should only include the specific IP address ranges of the trusted proxies within your architecture and should not trust entire subnets unless that subnet only has trusted proxies and no other services.
Caddy by default doesn't trust any other proxies and removes potentially fabricated headers that are likely to lead to security issues, and it is difficult to configure this incorrectly. This is an important security feature that is common with proxies with good security practices.
You should read the Caddy Trusted Proxies Documentation as part of configuring this. It's important to ensure you take the time to configure this carefully and correctly.
In the example we have a commented trusted_proxies directive which shows an example on adding the following networks
to the trusted proxy list in Caddy:
- 10.0.0.0/8
- 172.16.0.0/12
- 192.168.0.0/16
- fc00::/7
Configuration
Below you will find commented examples of the following configuration:
- Authelia Portal
- Protected Endpoint (Nextcloud)
Basic examples
This example is the preferred example for integration with Caddy. There is an advanced example but we strongly urge anyone who needs to use this for a particular reason to either reach out to us or Caddy for support to ensure the basic example covers your use case in a secure way.
Subdomain
{{< details "Caddyfile" >}}
## It is important to read the following document before enabling this section:
## https://www.authelia.com/integration/proxies/caddy/#forwarded-header-trust#trusted-proxies
(trusted_proxy_list) {
## Uncomment & adjust the following line to configure specific ranges which should be considered as trustworthy.
# trusted_proxies 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 fc00::/7
}
# Authelia Portal.
auth.example.com {
reverse_proxy authelia:9091 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
}
# Protected Endpoint.
nextcloud.example.com {
forward_auth authelia:9091 {
uri /api/authz/forward-auth
## The following commented line is for configuring the Authelia URL in the proxy. We strongly suggest
## this is configured in the Session Cookies section of the Authelia configuration.
# uri /api/authz/forward-auth?authelia_url=https://auth.example.com/
copy_headers Authorization Proxy-Authorization Remote-User Remote-Groups Remote-Email Remote-Name
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
reverse_proxy nextcloud:80 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
}
{{< /details >}}
Subpath
{{< details "Caddyfile" >}}
## It is important to read the following document before enabling this section:
## https://www.authelia.com/integration/proxies/caddy/#forwarded-header-trust#trusted-proxies
(trusted_proxy_list) {
## Uncomment & adjust the following line to configure specific ranges which should be considered as trustworthy.
# trusted_proxies 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 fc00::/7
}
example.com {
# Authelia Portal.
@authelia path /authelia /authelia/*
handle @authelia {
reverse_proxy authelia:9091 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
}
# Protected Endpoint.
@nextcloud path /nextcloud /nextcloud/*
handle @nextcloud {
forward_auth authelia:9091 {
uri /api/authz/forward-auth?authelia_url=https://example.com/authelia/
copy_headers Authorization Proxy-Authorization Remote-User Remote-Groups Remote-Email Remote-Name
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
reverse_proxy nextcloud:80 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
}
}
{{< /details >}}
Advanced example
The advanced example allows for more flexible customization, however the basic example should be preferred in most situations. If you are unsure of what you're doing please don't use this method.
Important: Making a mistake when configuring the advanced example could lead to authentication bypass or errors.
{{< details "Caddyfile" >}}
## It is important to read the following document before enabling this section:
## https://www.authelia.com/integration/proxies/caddy/#forwarded-header-trust#trusted-proxies
(trusted_proxy_list) {
## Uncomment & adjust the following line to configure specific ranges which should be considered as trustworthy.
# trusted_proxies 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16 fc00::/7
}
# Authelia Portal.
auth.example.com {
reverse_proxy authelia:9091 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
}
# Protected Endpoint.
nextcloud.example.com {
reverse_proxy authelia:9091 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
method GET
rewrite "/api/authz/forward-auth?authelia_url=https://auth.example.com/"
header_up X-Forwarded-Method {method}
header_up X-Forwarded-Uri {uri}
## If the auth request:
## 1. Responds with a status code IN the 200-299 range.
## Then:
## 1. Proxy the request to the backend.
## 2. Copy the relevant headers from the auth request and provide them to the backend.
@good status 2xx
handle_response @good {
request_header Authorization {http.reverse_proxy.header.Authorization}
request_header Proxy-Authorization {http.reverse_proxy.header.Proxy-Authorization}
request_header Remote-User {http.reverse_proxy.header.Remote-User}
request_header Remote-Groups {http.reverse_proxy.header.Remote-Groups}
request_header Remote-Email {http.reverse_proxy.header.Remote-Email}
request_header Remote-Name {http.reverse_proxy.header.Remote-Name}
}
}
reverse_proxy nextcloud:80 {
## This import needs to be included if you're relying on a trusted proxies configuration.
import trusted_proxy_list
}
}
{{< /details >}}