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[Letsencrypt](https://letsencrypt.org/) sets up an Nginx webserver and reverse proxy with php support and a built-in letsencrypt client that automates free SSL server certificate generation and renewal processes. It also contains fail2ban for intrusion prevention.
Our images support multiple architectures such as `x86-64`, `arm64` and `armhf`. We utilise the docker manifest for multi-platform awareness. More information is available from docker [here](https://github.com/docker/distribution/blob/master/docs/spec/manifest-v2-2.md#manifest-list) and our announcement [here](https://blog.linuxserver.io/2019/02/21/the-lsio-pipeline-project/).
Docker images are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate `<external>:<internal>` respectively. For example, `-p 8080:80` would expose port `80` from inside the container to be accessible from the host's IP on port `8080` outside the container.
| `URL=yourdomain.url` | Top url you have control over (`customdomain.com` if you own it, or `customsubdomain.ddnsprovider.com` if dynamic dns). |
| `SUBDOMAINS=www,` | Subdomains you'd like the cert to cover (comma separated, no spaces) ie. `www,ftp,cloud`. For a wildcard cert, set this _exactly_ to `wildcard` (wildcard cert is available via `dns` and `duckdns` validation only) |
| `VALIDATION=http` | Letsencrypt validation method to use, options are `http`, `tls-sni`, `dns` or `duckdns` (`dns` method also requires `DNSPLUGIN` variable set) (`duckdns` method requires `DUCKDNSTOKEN` variable set, and the `SUBDOMAINS` variable must be either empty or set to `wildcard`). |
| `DNSPLUGIN=cloudflare` | Required if `VALIDATION` is set to `dns`. Options are `cloudflare`, `cloudxns`, `digitalocean`, `dnsimple`, `dnsmadeeasy`, `google`, `inwx`, `luadns`, `nsone`, `ovh`, `rfc2136` and `route53`. Also need to enter the credentials into the corresponding ini file under `/config/dns-conf`. |
| `DHLEVEL=2048` | Dhparams bit value (default=2048, can be set to `1024` or `4096`). |
| `ONLY_SUBDOMAINS=false` | If you wish to get certs only for certain subdomains, but not the main domain (main domain may be hosted on another machine and cannot be validated), set this to `true` |
| `STAGING=false` | Set to `true` to retrieve certs in staging mode. Rate limits will be much higher, but the resulting cert will not pass the browser's security test. Only to be used for testing purposes. |
When using volumes (`-v` flags), permissions issues can arise between the host OS and the container, we avoid this issue by allowing you to specify the user `PUID` and group `PGID`.
* Before running this container, make sure that the url and subdomains are properly forwarded to this container's host, and that port 443 (and/or 80) is not being used by another service on the host (NAS gui, another webserver, etc.).
* For `http` validation, port 80 on the internet side of the router should be forwarded to this container's port 80
* For `tls-sni` validation, port 443 on the internet side of the router should be forwarded to this container's port 443
* For `dns` validation, make sure to enter your credentials into the corresponding ini file under `/config/dns-conf`
* Cloudflare provides free accounts for managing dns and is very easy to use with this image. Make sure that it is set up for "dns only" instead of "dns + proxy"
* Google dns plugin is meant to be used with "Google Cloud DNS", a paid enterprise product, and not for "Google Domains DNS"
* For `duckdns` validation, either leave the `SUBDOMAINS` variable empty or set it to `wildcard`, and set the `DUCKDNSTOKEN` variable with your duckdns token. Due to a limitation of duckdns, the resulting cert will only cover either main subdomain (ie. `yoursubdomain.duckdns.org`), or sub-subdomains (ie. `*.yoursubdomain.duckdns.org`), but will not both at the same time. You can use our [duckdns image](https://hub.docker.com/r/linuxserver/duckdns/) to update your IP on duckdns.org.
*`--cap-add=NET_ADMIN` is required for fail2ban to modify iptables
* If you need a dynamic dns provider, you can use the free provider duckdns.org where the `URL` will be `yoursubdomain.duckdns.org` and the `SUBDOMAINS` can be `www,ftp,cloud` with http validation, or `wildcard` with dns validation.
* After setup, navigate to `https://yourdomain.url` to access the default homepage (http access through port 80 is disabled by default, you can enable it by editing the default site config at `/config/nginx/site-confs/default`).
* Certs are checked nightly and if expiration is within 30 days, renewal is attempted. If your cert is about to expire in less than 30 days, check the logs under `/config/log/letsencrypt` to see why the renewals have been failing. It is recommended to input your e-mail in docker parameters so you receive expiration notices from letsencrypt in those circumstances.
* The container detects changes to url and subdomains, revokes existing certs and generates new ones during start. It also detects changes to the DHLEVEL parameter and replaces the dhparams file.
* If you'd like to password protect your sites, you can use htpasswd. Run the following command on your host to generate the htpasswd file `docker exec -it letsencrypt htpasswd -c /config/nginx/.htpasswd <username>`
* You can add multiple user:pass to `.htpasswd`. For the first user, use the above command, for others, use the above command without the `-c` flag, as it will force deletion of the existing `.htpasswd` and creation of a new one
* You can also use ldap auth for security and access control. A sample, user configurable ldap.conf is provided, and it requires the separate image [linuxserver/ldap-auth](https://hub.docker.com/r/linuxserver/ldap-auth/) to communicate with an ldap server.
* The default site config resides at `/config/nginx/site-confs/default`. Feel free to modify this file, and you can add other conf files to this directory. However, if you delete the `default` file, a new default will be created on container start.
* Preset reverse proxy config files are added for popular apps. See the `README.md` file under `/config/nginx/proxy_confs` for instructions on how to enable them. The preset confs reside in and get imported from [this repo](https://github.com/linuxserver/reverse-proxy-confs).
* If you wish to hide your site from search engine crawlers, you may find it useful to add this configuration line to your site config, within the server block, above the line where ssl.conf is included
This will *ask* Google et al not to index and list your site. Be careful with this, as you will eventually be de-listed if you leave this line in on a site you wish to be present on search engines
1.*(Easier)* Mount the letsencrypt config folder in other containers (ie. `-v /path-to-le-config:/le-ssl`) and in the other containers, use the cert location `/le-ssl/keys/letsencrypt/`
2.*(More secure)* Mount the letsencrypt folder `etc/letsencrypt` that resides under `/config` in other containers (ie. `-v /path-to-le-config/etc/letsencrypt:/le-ssl`) and in the other containers, use the cert location `/le-ssl/live/<your.domain.url>/` (This is more secure because the first method shares the entire letsencrypt config folder with other containers, including the www files, whereas the second method only shares the ssl certs)
* To modify filters and actions, instead of editing the `.conf` files, create `.local` files with the same name and edit those because .conf files get overwritten when the actions and filters are updated. `.local` files will append whatever's in the `.conf` files (ie. `nginx-http-auth.conf` --> `nginx-http-auth.local`)
* **25.03.19:** - Rebase aarch64 image back to 3.8 due to python issues (specifically with fail2ban), switch packages to python 3 on amd64 and armhf, clean up pip/python cache to shrink image size.
* **30.08.18:** - Add support for ldap auth, add proxy confs for bazarr, couchpotato, headphones, lidarr and plex subfolder (thanks @nemchik and @jedahan)
* **01.02.18:** - Big changes. `VALIDATION` parameter added for choosing letsencrypt validation methods, including dns through official plugins. `HTTPVAL` is deprecated. `STAGING` parameter added for testing. Backwards compatibility for the short term. Since tls-sni is disabled by letsencrypt, most users will have to change their settings and adopt the new parameters within the next 90 days. Reorganized the nginx default config, split ssl settings into new ssl.conf
* **13.01.18:** - Re-enable ipv6 due to update to fail2ban 0.10.1. Existing users can enable ipv6 by deleting `/config/fail2ban/action.d/iptables-common.local` and restarting the container after updating the image
* **10.01.18:** - Add option for http validation on port 80
* **05.01.18:** - Rebase to alpine 3.7
* **04.11.17:** - Add php7 soap module
* **31.10.17:** - Add php7 exif and xmlreader modules
* **25.09.17:** - Manage fail2ban via s6
* **24.09.17:** - Add memcached service
* **01.09.17:** - `--privileged` is no longer required as long as `--cap-add=NET_ADMIN` is added, instructions modified accordingly, disabled fail2ban ipv6 actions due to requiring access to host kernel modules
* **31.08.17:** - Add php7-phar
* **14.07.17:** - Enable modules dynamically in nginx.conf
