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docs/config.md
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@ -122,14 +122,14 @@ Please also refer to the [rate limiting](#rate-limiting) settings below, specifi
and `visitor-attachment-daily-bandwidth-limit`. Setting these conservatively is necessary to avoid abuse. and `visitor-attachment-daily-bandwidth-limit`. Setting these conservatively is necessary to avoid abuse.
## Access control ## Access control
By default, the ntfy server is open for everyone, meaning **everyone can read and write to any topic**. To restrict access By default, the ntfy server is open for everyone, meaning **everyone can read and write to any topic** (this is how
to your own server, you can optionally configure authentication and authorization. ntfy.sh is configured). To restrict access to your own server, you can optionally configure authentication and authorization.
ntfy's auth is implemented with a simple [SQLite](https://www.sqlite.org/)-based backend. It implements two roles ntfy's auth is implemented with a simple [SQLite](https://www.sqlite.org/)-based backend. It implements two roles
(`user` and `admin`) and per-topic `read` and `write` permissions using an [access control list (ACL)](https://en.wikipedia.org/wiki/Access-control_list). (`user` and `admin`) and per-topic `read` and `write` permissions using an [access control list (ACL)](https://en.wikipedia.org/wiki/Access-control_list).
Access control entries can be applied to users as well as the special everyone user (`*`), which represents anonymous API access. Access control entries can be applied to users as well as the special everyone user (`*`), which represents anonymous API access.
To set up auth, simply configure the following two options: To set up auth, simply **configure the following two options**:
* `auth-file` is the user/access database; it is created automatically if it doesn't already exist * `auth-file` is the user/access database; it is created automatically if it doesn't already exist
* `auth-default-access` defines the default/fallback access if no access control entry is found; it can be * `auth-default-access` defines the default/fallback access if no access control entry is found; it can be
@ -137,7 +137,7 @@ To set up auth, simply configure the following two options:
Once configured, you can use the `ntfy user` command to [add or modify users](#users-and-roles), and the `ntfy access` command Once configured, you can use the `ntfy user` command to [add or modify users](#users-and-roles), and the `ntfy access` command
lets you [modify the access control list](#access-control-list-acl) for specific users and topic patterns. Both of these lets you [modify the access control list](#access-control-list-acl) for specific users and topic patterns. Both of these
commands directly edit the auth database (as defined in `auth-file`), so they only work on the server, and only if the user commands **directly edit the auth database** (as defined in `auth-file`), so they only work on the server, and only if the user
accessing them has the right permissions. accessing them has the right permissions.
### Users and roles ### Users and roles
@ -163,9 +163,46 @@ ntfy user change-role phil admin # Make user phil an admin
``` ```
### Access control list (ACL) ### Access control list (ACL)
The access control list manages access to topics for non-admin users. Each entry represents the access permissions for The access control list (ACL) **manages access to topics for non-admin users, and for anonymous access**. Each entry
a user to a specific topic or topic pattern. Here's an example ACL: represents the access permissions for a user to a specific topic or topic pattern.
**Modifying the ACL:**
The access control list can be displayed or modified with the `ntfy access` command:
```
ntfy access # Shows the entire access control list
ntfy access USERNAME # Shows access control entries for USERNAME
ntfy access USERNAME TOPIC PERMISSION # Allow/deny access for USERNAME to TOPIC
```
A `USERNAME` is an existing user, as created with `ntfy user add` (see [users and roles](#users-and-roles)), or the
anonymous user `everyone` or `*`, which represents clients that access the API without username/password.
A `TOPIC` is either a specific topic name (e.g. `mytopic`, or `phil_alerts`), or a wildcard pattern that matches any
number of topics (e.g. `alerts_*` or `ben-*`). Only the wildcard character `*` is supported. It stands for zero to any
number of characters.
A `PERMISSION` is any of the following supported permissions:
* `read-write` (alias: `rw`): Allows [publishing messages](publish.md) to the given topic, as well as
[subscribing](subscribe/api.md) and reading messages
* `read-only` (aliases: `read`, `ro`): Allows only subscribing and reading messages, but not publishing to the topic
* `write-only` (aliases: `write`, `wo`): Allows only publishing to the topic, but not subscribing to it
* `deny` (alias: `none`): Allows neither publishing nor subscribing to a topic
**Example commands** (type `ntfy access --help` for more details):
```
ntfy access # Shows entire access control list
ntfy access phil # Shows access for user phil
ntfy access phil mytopic rw # Allow read-write access to mytopic for user phil
ntfy access everyone mytopic rw # Allow anonymous read-write access to mytopic
ntfy access everyone "up*" write # Allow anonymous write-only access to topics "up..."
ntfy access --reset # Reset entire access control list
ntfy access --reset phil # Reset all access for user phil
ntfy access --reset phil mytopic # Reset access for user phil and topic mytopic
```
**Example ACL:**
``` ```
$ ntfy access $ ntfy access
User phil (admin) User phil (admin)
@ -182,43 +219,9 @@ User * (anonymous)
In this example, `phil` has the role `admin`, so he has read-write access to all topics (no ACL entries are necessary). In this example, `phil` has the role `admin`, so he has read-write access to all topics (no ACL entries are necessary).
User `ben` has three topic-specific entries. He can read, but not write to topic `furnace`, and has read-write access User `ben` has three topic-specific entries. He can read, but not write to topic `furnace`, and has read-write access
to topic `garagedoor` and all topics starting with the word `alerts` (wildcards). Clients that are not authenticated to topic `garagedoor` and all topics starting with the word `alerts` (wildcards). Clients that are not authenticated
(called `*`/`everyone`) only have read access to the `announcements` and `server-stats` topics. (called `*`/`everyone`) only have read access to the `announcements` and `server-stats` topics.
**Modifying the ACL**
The access control list can be modified with the `ntfy access` command:
```
ntfy access # Shows the entire access control list
ntfy access USERNAME # Shows access control entries for USERNAME
ntfy access USERNAME TOPIC PERMISSION # Allow/deny access for USERNAME to TOPIC
```
XXXXXXXXXXXXXXXXXXXXXXXX
USERNAME an existing user, as created with 'ntfy user add', or "everyone"/"*"
to define access rules for anonymous/unauthenticated clients
TOPIC name of a topic with optional wildcards, e.g. "mytopic*"
**Permissions:**
* read-write (alias: rw)
- read-only (aliases: read, ro)
- write-only (aliases: write, wo)
- deny (alias: none)
**Example commands** (type `ntfy access --help` for more details):
```
ntfy access # Shows entire access control list
ntfy access phil # Shows access for user phil
ntfy access phil mytopic rw # Allow read-write access to mytopic for user phil
ntfy access everyone mytopic rw # Allow anonymous read-write access to mytopic
ntfy access everyone "up*" write # Allow anonymous write-only access to topics "up..."
ntfy access --reset # Reset entire access control list
ntfy access --reset phil # Reset all access for user phil
ntfy access --reset phil mytopic # Reset access for user phil and topic mytopic
```
### Example: Private instance ### Example: Private instance
The easiest way to configure a private instance is to set `auth-default-access` to `deny-all` in the `server.yml`: The easiest way to configure a private instance is to set `auth-default-access` to `deny-all` in the `server.yml`:
@ -714,39 +717,41 @@ Each config option can be set in the config file `/etc/ntfy/server.yml` (e.g. `l
CLI option (e.g. `--listen-http :80`. Here's a list of all available options. Alternatively, you can set an environment CLI option (e.g. `--listen-http :80`. Here's a list of all available options. Alternatively, you can set an environment
variable before running the `ntfy` command (e.g. `export NTFY_LISTEN_HTTP=:80`). variable before running the `ntfy` command (e.g. `export NTFY_LISTEN_HTTP=:80`).
| Config option | Env variable | Format | Default | Description | | Config option | Env variable | Format | Default | Description |
|--------------------------------------------|-------------------------------------------------|------------------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| |--------------------------------------------|-------------------------------------------------|-----------------------------------------------------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `base-url` | `NTFY_BASE_URL` | *URL* | - | Public facing base URL of the service (e.g. `https://ntfy.sh`) | | `base-url` | `NTFY_BASE_URL` | *URL* | - | Public facing base URL of the service (e.g. `https://ntfy.sh`) |
| `listen-http` | `NTFY_LISTEN_HTTP` | `[host]:port` | `:80` | Listen address for the HTTP web server | | `listen-http` | `NTFY_LISTEN_HTTP` | `[host]:port` | `:80` | Listen address for the HTTP web server |
| `listen-https` | `NTFY_LISTEN_HTTPS` | `[host]:port` | - | Listen address for the HTTPS web server. If set, you also need to set `key-file` and `cert-file`. | | `listen-https` | `NTFY_LISTEN_HTTPS` | `[host]:port` | - | Listen address for the HTTPS web server. If set, you also need to set `key-file` and `cert-file`. |
| `listen-unix` | `NTFY_LISTEN_UNIX` | *filename* | - | Path to a Unix socket to listen on | | `listen-unix` | `NTFY_LISTEN_UNIX` | *filename* | - | Path to a Unix socket to listen on |
| `key-file` | `NTFY_KEY_FILE` | *filename* | - | HTTPS/TLS private key file, only used if `listen-https` is set. | | `key-file` | `NTFY_KEY_FILE` | *filename* | - | HTTPS/TLS private key file, only used if `listen-https` is set. |
| `cert-file` | `NTFY_CERT_FILE` | *filename* | - | HTTPS/TLS certificate file, only used if `listen-https` is set. | | `cert-file` | `NTFY_CERT_FILE` | *filename* | - | HTTPS/TLS certificate file, only used if `listen-https` is set. |
| `firebase-key-file` | `NTFY_FIREBASE_KEY_FILE` | *filename* | - | If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app. This is optional and only required to save battery when using the Android app. See [Firebase (FCM](#firebase-fcm). | | `firebase-key-file` | `NTFY_FIREBASE_KEY_FILE` | *filename* | - | If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app. This is optional and only required to save battery when using the Android app. See [Firebase (FCM](#firebase-fcm). |
| `cache-file` | `NTFY_CACHE_FILE` | *filename* | - | If set, messages are cached in a local SQLite database instead of only in-memory. This allows for service restarts without losing messages in support of the since= parameter. See [message cache](#message-cache). | | `cache-file` | `NTFY_CACHE_FILE` | *filename* | - | If set, messages are cached in a local SQLite database instead of only in-memory. This allows for service restarts without losing messages in support of the since= parameter. See [message cache](#message-cache). |
| `cache-duration` | `NTFY_CACHE_DURATION` | *duration* | 12h | Duration for which messages will be buffered before they are deleted. This is required to support the `since=...` and `poll=1` parameter. Set this to `0` to disable the cache entirely. | | `cache-duration` | `NTFY_CACHE_DURATION` | *duration* | 12h | Duration for which messages will be buffered before they are deleted. This is required to support the `since=...` and `poll=1` parameter. Set this to `0` to disable the cache entirely. |
| `behind-proxy` | `NTFY_BEHIND_PROXY` | *bool* | false | If set, the X-Forwarded-For header is used to determine the visitor IP address instead of the remote address of the connection. | | `auth-file` | `NTFY_AUTH_FILE` | *filename* | - | Auth database file used for access control. If set, enables authentication and access control. See [access control](#access-control). |
| `attachment-cache-dir` | `NTFY_ATTACHMENT_CACHE_DIR` | *directory* | - | Cache directory for attached files. To enable attachments, this has to be set. | | `auth-default-access` | `NTFY_AUTH_DEFAULT_ACCESS` | `read-write`, `read-only`, `write-only`, `deny-all` | - | Default permissions if no matching entries in the auth database are found. Default is `read-write`. |
| `attachment-total-size-limit` | `NTFY_ATTACHMENT_TOTAL_SIZE_LIMIT` | *size* | 5G | Limit of the on-disk attachment cache directory. If the limits is exceeded, new attachments will be rejected. | | `behind-proxy` | `NTFY_BEHIND_PROXY` | *bool* | false | If set, the X-Forwarded-For header is used to determine the visitor IP address instead of the remote address of the connection. |
| `attachment-file-size-limit` | `NTFY_ATTACHMENT_FILE_SIZE_LIMIT` | *size* | 15M | Per-file attachment size limit (e.g. 300k, 2M, 100M). Larger attachment will be rejected. | | `attachment-cache-dir` | `NTFY_ATTACHMENT_CACHE_DIR` | *directory* | - | Cache directory for attached files. To enable attachments, this has to be set. |
| `attachment-expiry-duration` | `NTFY_ATTACHMENT_EXPIRY_DURATION` | *duration* | 3h | Duration after which uploaded attachments will be deleted (e.g. 3h, 20h). Strongly affects `visitor-attachment-total-size-limit`. | | `attachment-total-size-limit` | `NTFY_ATTACHMENT_TOTAL_SIZE_LIMIT` | *size* | 5G | Limit of the on-disk attachment cache directory. If the limits is exceeded, new attachments will be rejected. |
| `smtp-sender-addr` | `NTFY_SMTP_SENDER_ADDR` | `host:port` | - | SMTP server address to allow email sending | | `attachment-file-size-limit` | `NTFY_ATTACHMENT_FILE_SIZE_LIMIT` | *size* | 15M | Per-file attachment size limit (e.g. 300k, 2M, 100M). Larger attachment will be rejected. |
| `smtp-sender-user` | `NTFY_SMTP_SENDER_USER` | *string* | - | SMTP user; only used if e-mail sending is enabled | | `attachment-expiry-duration` | `NTFY_ATTACHMENT_EXPIRY_DURATION` | *duration* | 3h | Duration after which uploaded attachments will be deleted (e.g. 3h, 20h). Strongly affects `visitor-attachment-total-size-limit`. |
| `smtp-sender-pass` | `NTFY_SMTP_SENDER_PASS` | *string* | - | SMTP password; only used if e-mail sending is enabled | | `smtp-sender-addr` | `NTFY_SMTP_SENDER_ADDR` | `host:port` | - | SMTP server address to allow email sending |
| `smtp-sender-from` | `NTFY_SMTP_SENDER_FROM` | *e-mail address* | - | SMTP sender e-mail address; only used if e-mail sending is enabled | | `smtp-sender-user` | `NTFY_SMTP_SENDER_USER` | *string* | - | SMTP user; only used if e-mail sending is enabled |
| `smtp-server-listen` | `NTFY_SMTP_SERVER_LISTEN` | `[ip]:port` | - | Defines the IP address and port the SMTP server will listen on, e.g. `:25` or `1.2.3.4:25` | | `smtp-sender-pass` | `NTFY_SMTP_SENDER_PASS` | *string* | - | SMTP password; only used if e-mail sending is enabled |
| `smtp-server-domain` | `NTFY_SMTP_SERVER_DOMAIN` | *domain name* | - | SMTP server e-mail domain, e.g. `ntfy.sh` | | `smtp-sender-from` | `NTFY_SMTP_SENDER_FROM` | *e-mail address* | - | SMTP sender e-mail address; only used if e-mail sending is enabled |
| `smtp-server-addr-prefix` | `NTFY_SMTP_SERVER_ADDR_PREFIX` | `[ip]:port` | - | Optional prefix for the e-mail addresses to prevent spam, e.g. `ntfy-` | | `smtp-server-listen` | `NTFY_SMTP_SERVER_LISTEN` | `[ip]:port` | - | Defines the IP address and port the SMTP server will listen on, e.g. `:25` or `1.2.3.4:25` |
| `keepalive-interval` | `NTFY_KEEPALIVE_INTERVAL` | *duration* | 45s | Interval in which keepalive messages are sent to the client. This is to prevent intermediaries closing the connection for inactivity. Note that the Android app has a hardcoded timeout at 77s, so it should be less than that. | | `smtp-server-domain` | `NTFY_SMTP_SERVER_DOMAIN` | *domain name* | - | SMTP server e-mail domain, e.g. `ntfy.sh` |
| `manager-interval` | `$NTFY_MANAGER_INTERVAL` | *duration* | 1m | Interval in which the manager prunes old messages, deletes topics and prints the stats. | | `smtp-server-addr-prefix` | `NTFY_SMTP_SERVER_ADDR_PREFIX` | `[ip]:port` | - | Optional prefix for the e-mail addresses to prevent spam, e.g. `ntfy-` |
| `global-topic-limit` | `NTFY_GLOBAL_TOPIC_LIMIT` | *number* | 15,000 | Rate limiting: Total number of topics before the server rejects new topics. | | `keepalive-interval` | `NTFY_KEEPALIVE_INTERVAL` | *duration* | 45s | Interval in which keepalive messages are sent to the client. This is to prevent intermediaries closing the connection for inactivity. Note that the Android app has a hardcoded timeout at 77s, so it should be less than that. |
| `visitor-subscription-limit` | `NTFY_VISITOR_SUBSCRIPTION_LIMIT` | *number* | 30 | Rate limiting: Number of subscriptions per visitor (IP address) | | `manager-interval` | `$NTFY_MANAGER_INTERVAL` | *duration* | 1m | Interval in which the manager prunes old messages, deletes topics and prints the stats. |
| `visitor-attachment-total-size-limit` | `NTFY_VISITOR_ATTACHMENT_TOTAL_SIZE_LIMIT` | *size* | 100M | Rate limiting: Total storage limit used for attachments per visitor, for all attachments combined. Storage is freed after attachments expire. See `attachment-expiry-duration`. | | `global-topic-limit` | `NTFY_GLOBAL_TOPIC_LIMIT` | *number* | 15,000 | Rate limiting: Total number of topics before the server rejects new topics. |
| `visitor-attachment-daily-bandwidth-limit` | `NTFY_VISITOR_ATTACHMENT_DAILY_BANDWIDTH_LIMIT` | *size* | 500M | Rate limiting: Total daily attachment download/upload traffic limit per visitor. This is to protect your bandwidth costs from exploding. | | `visitor-subscription-limit` | `NTFY_VISITOR_SUBSCRIPTION_LIMIT` | *number* | 30 | Rate limiting: Number of subscriptions per visitor (IP address) |
| `visitor-request-limit-burst` | `NTFY_VISITOR_REQUEST_LIMIT_BURST` | *number* | 60 | Rate limiting: Allowed GET/PUT/POST requests per second, per visitor. This setting is the initial bucket of requests each visitor has | | `visitor-attachment-total-size-limit` | `NTFY_VISITOR_ATTACHMENT_TOTAL_SIZE_LIMIT` | *size* | 100M | Rate limiting: Total storage limit used for attachments per visitor, for all attachments combined. Storage is freed after attachments expire. See `attachment-expiry-duration`. |
| `visitor-request-limit-replenish` | `NTFY_VISITOR_REQUEST_LIMIT_REPLENISH` | *duration* | 10s | Rate limiting: Strongly related to `visitor-request-limit-burst`: The rate at which the bucket is refilled | | `visitor-attachment-daily-bandwidth-limit` | `NTFY_VISITOR_ATTACHMENT_DAILY_BANDWIDTH_LIMIT` | *size* | 500M | Rate limiting: Total daily attachment download/upload traffic limit per visitor. This is to protect your bandwidth costs from exploding. |
| `visitor-email-limit-burst` | `NTFY_VISITOR_EMAIL_LIMIT_BURST` | *number* | 16 | Rate limiting:Initial limit of e-mails per visitor | | `visitor-request-limit-burst` | `NTFY_VISITOR_REQUEST_LIMIT_BURST` | *number* | 60 | Rate limiting: Allowed GET/PUT/POST requests per second, per visitor. This setting is the initial bucket of requests each visitor has |
| `visitor-email-limit-replenish` | `NTFY_VISITOR_EMAIL_LIMIT_REPLENISH` | *duration* | 1h | Rate limiting: Strongly related to `visitor-email-limit-burst`: The rate at which the bucket is refilled | | `visitor-request-limit-replenish` | `NTFY_VISITOR_REQUEST_LIMIT_REPLENISH` | *duration* | 10s | Rate limiting: Strongly related to `visitor-request-limit-burst`: The rate at which the bucket is refilled |
| `visitor-email-limit-burst` | `NTFY_VISITOR_EMAIL_LIMIT_BURST` | *number* | 16 | Rate limiting:Initial limit of e-mails per visitor |
| `visitor-email-limit-replenish` | `NTFY_VISITOR_EMAIL_LIMIT_REPLENISH` | *duration* | 1h | Rate limiting: Strongly related to `visitor-email-limit-burst`: The rate at which the bucket is refilled |
The format for a *duration* is: `<number>(smh)`, e.g. 30s, 20m or 1h. The format for a *duration* is: `<number>(smh)`, e.g. 30s, 20m or 1h.
The format for a *size* is: `<number>(GMK)`, e.g. 1G, 200M or 4000k. The format for a *size* is: `<number>(GMK)`, e.g. 1G, 200M or 4000k.
@ -760,6 +765,9 @@ NAME:
USAGE: USAGE:
ntfy serve [OPTIONS..] ntfy serve [OPTIONS..]
CATEGORY:
Server commands
DESCRIPTION: DESCRIPTION:
Run the ntfy server and listen for incoming requests Run the ntfy server and listen for incoming requests
@ -781,6 +789,8 @@ OPTIONS:
--firebase-key-file value, -F value Firebase credentials file; if set additionally publish to FCM topic [$NTFY_FIREBASE_KEY_FILE] --firebase-key-file value, -F value Firebase credentials file; if set additionally publish to FCM topic [$NTFY_FIREBASE_KEY_FILE]
--cache-file value, -C value cache file used for message caching [$NTFY_CACHE_FILE] --cache-file value, -C value cache file used for message caching [$NTFY_CACHE_FILE]
--cache-duration since, -b since buffer messages for this time to allow since requests (default: 12h0m0s) [$NTFY_CACHE_DURATION] --cache-duration since, -b since buffer messages for this time to allow since requests (default: 12h0m0s) [$NTFY_CACHE_DURATION]
--auth-file value, -H value auth database file used for access control [$NTFY_AUTH_FILE]
--auth-default-access value, -p value default permissions if no matching entries in the auth database are found (default: "read-write") [$NTFY_AUTH_DEFAULT_ACCESS]
--attachment-cache-dir value cache directory for attached files [$NTFY_ATTACHMENT_CACHE_DIR] --attachment-cache-dir value cache directory for attached files [$NTFY_ATTACHMENT_CACHE_DIR]
--attachment-total-size-limit value, -A value limit of the on-disk attachment cache (default: 5G) [$NTFY_ATTACHMENT_TOTAL_SIZE_LIMIT] --attachment-total-size-limit value, -A value limit of the on-disk attachment cache (default: 5G) [$NTFY_ATTACHMENT_TOTAL_SIZE_LIMIT]
--attachment-file-size-limit value, -Y value per-file attachment size limit (e.g. 300k, 2M, 100M) (default: 15M) [$NTFY_ATTACHMENT_FILE_SIZE_LIMIT] --attachment-file-size-limit value, -Y value per-file attachment size limit (e.g. 300k, 2M, 100M) (default: 15M) [$NTFY_ATTACHMENT_FILE_SIZE_LIMIT]