File Firewall (ES only) — ownCloud 9.0 Server Administration Manual 9.0 documentation

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# File Firewall (ES only)

The File Firewall GUI enables you to create and manage firewall rule sets from your ownCloud admin page. The File Firewall gives you finer-grained control of access and sharing, with rules for allowing or denying access, and restrictions per group, upload size, client devices, IP address, time of day, and many more criteria. For additional flexibility the File Firewall also supports regular expressions.

Each rule consists of one or more conditions. A request matches a rule if all conditions evaluate to true. If a request matches at least one of the defined rules, the request is blocked and the file content can not be read or written.

Note

As of ownCloud 9.0, the File Firewall app cannot lock out administrators from the Web interface when rules are misconfigured.

Figure 1 shows an empty firewall configuration panel. Set your logging level to Failures Only for debugging, and create a new ruleset by clicking the Add Group button. After setting up your rules you must click the Save Rules button.

Figure 1: Empty File Firewall configuration panel

Figure 2 shows two rules. The first rule, No Support outside office hours, prevents members of the support group from logging into the ownCloud Web interface from 5pm-9am, and also blocks client syncing.

The second rule prevents members of the qa-team group from accessing the Web UI from IP addresses that are outside of the local network.

Figure 2: Two example rules that restrict logins per user group

All other users are not affected, and can log in anytime from anywhere.

## Available Conditions

User Group
  The user (is|is not) a member of the selected group.
User Agent
  The User-Agent of the request (matches|does not match) the given string.
User Device
  A shortcut for matching all known (`android` | `ios` | `desktop`) sync clients by their User Agent string.
Request Time
  The time of the request (has to|must not) be in a single range from beginning time to end time.
Request URL
  The full page URL (has to|must not) (match|contain|begin with|end) with a given string.
Request Type
  The request (is|is not) a (WebDAV|public share link|other) request.
Request IP Range (IPv4) and IP Range (IPv6)
  The request’s `REMOTE_ADDR` header (is|is not) matching the given IP range.
Subnet (IPv4) and Subnet (IPv6)
  The request’s `SERVER_ADDR` header (is|is not) matching the given IP range.
File Size Upload
  When a file is uploaded the size has to be (less|less or equal|greater|greater or equal) to the given size.
File Mimetype Upload
  When a file is uploaded the mimetype (is|is not|begins with|does not begin with|ends with|does not end with) the given string.
System File Tag
  One of the parent folders or the file itself (is|is not) tagged with a System tag.
Regular Expression
  The File Firewall supports regular expressions, allowing you to create custom rules using the following conditions:

- IP Range (IPv4)
- IP Range (IPv6)
- Subnet (IPv4)
- Subnet (IPv6)
- User agent
- User group
- Request URL

You can combine multiple rules into one rule. E.g., if a rule applies to both the support and the qa-team you could write your rule like this:

    Regular Expression > ^(support|qa-team)$ > is > User group

## No Manual Editing

We do not recommend modifying the configuration values directly in your `config.php`. These use JSON encoding, so the values are difficult to read and a single typo will break all of your rules.

## Controlling Access to Folders

The easiest way to block access to a folder, starting with ownCloud 9.0, is to use a system tag. A new rule type was added which allows you to block access to files and folders, where at least one of the parents has a given tag. Now you just need to add the tag to the folder or file, and then block the tag with the File Firewall.

This example blocks access to any folder with the tag “Confidential”.

Block by System Tag:

    System file tag:   is       "Confidential"
    Subnet IPv4:       is not   "255.255.255.0/24"

## Custom Configuration for Branded Clients

If you are using branded ownCloud clients, you may define `firewall.branded_clients` in your `config.php` to identify your branded clients in the firewall “User Device” rule.

The configuration is a `User-Agent` => `Device` map. `Device` must be one of the following:

- android
- android_branded
- ios
- ios_branded
- desktop
- desktop_branded

The `User-Agent` is always compared all lowercase. By default the agent is compared with `equals`. When a trailing or leading asterisk, `*`, is found, the agent is compared with `starts with` or `ends with`. If the agent has both a leading and a trailing `*`, the string must appear anywhere. For technical reasons the `User-Agent` string must be at least 4 characters (including wildcards). (When you build your branded client you have the option to create a custom User Agent.)

In this example configuration you need to replace the example User Agent strings, for example `'android_branded'`, with your own User Agent strings:

    // config.php

     'firewall.branded_clients' => array(
       'my ownbrander android user agent string' => 'android_branded',
       'my ownbrander second android user agent string' => 'android_branded',
       'my ownbrander ios user agent string' => 'ios_branded',
       'my ownbrander second ios user agent string' => 'ios_branded',
       'my ownbrander desktop user agent string' => 'desktop_branded',
       'my ownbrander second desktop user agent string' => 'desktop_branded',
     ),

The Web UI dropdown then expands to the following options:

- Android Client - always visible
- iOS Client - always visible
- Desktop Client - always visible
- Android Client (Branded) - visible when at least one `android_branded` is defined
- iOS Client (Branded) - visible when at least one `ios_branded` is defined
- Desktop Client (Branded) - visible when at least one `desktop_branded` is defined
- All branded clients - visible when at least one of `android_branded`, `ios_branded` or `desktop_branded` is defined
- All non-branded clients - visible when at least one of `android_branded`, `ios_branded` or `desktop_branded` is defined
- Others (Browsers, etc.) - always visible

Then these options operate this way:

- The `* Client` options only match `android`, `ios` and `desktop` respectively.
- The `* Client (Branded)` options match the `*_branded` agents equivalent.
- `All branded clients` matches: `android_branded`, `ios_branded` and `desktop_branded`
- `All non-branded clients` matches: `android`, `ios` and `desktop`

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