# Server security

## php.ini

PHP settings are defined in:

- a main configuration file, usually found under `/etc/php5/php.ini`; some distributions provide different configuration environments, e.g.
  - `/etc/php5/php.ini` - used when running console scripts
  - `/etc/php5/apache2/php.ini` - used when a client requests PHP resources from Apache
  - `/etc/php5/php-fpm.conf` - used when PHP requests are proxied to PHP-FPM
- additional configuration files/entries, depending on the installed/enabled extensions:
  - `/etc/php/conf.d/xdebug.ini`

### Locate .ini files

#### Console environment

    $ php --ini
    Configuration File (php.ini) Path: /etc/php
    Loaded Configuration File:         /etc/php/php.ini
    Scan for additional .ini files in: /etc/php/conf.d
    Additional .ini files parsed:      /etc/php/conf.d/xdebug.ini

#### Server environment

- create a `phpinfo.php` script located in a path supported by the web server, e.g.
  - Apache (with user dirs enabled): `/home/myself/public_html/phpinfo.php`
  - `/var/www/test/phpinfo.php`
- make sure the script is readable by the web server user/group (usually, `www`, `www-data` or `httpd`)
- access the script from a web browser

- look at the Loaded Configuration File and Scan this dir for additional .ini files entries

      <?php phpinfo(); ?>

## fail2ban

`fail2ban` is an intrusion prevention framework that reads server (Apache, SSH, etc.) and uses `iptables` profiles to block brute-force attempts:

- Official website
- Source code

### Read Shaarli logs to ban IPs

Example configuration:

- allow 3 login attempts per IP address
- after 3 failures, permanently ban the corresponding IP adddress

`/etc/fail2ban/jail.local`

    [shaarli-auth][](.html)
    enabled  = true
    port     = https,http
    filter   = shaarli-auth
    logpath  = /var/www/path/to/shaarli/data/log.txt
    maxretry = 3
    bantime = -1

`/etc/fail2ban/filter.d/shaarli-auth.conf`

    [INCLUDES][](.html)
    before = common.conf
    [Definition][](.html)
    failregex = \s-\s<HOST>\s-\sLogin failed for user.*$
    ignoreregex =

## Robots - Restricting search engines and web crawler traffic

Creating a `robots.txt` with the following contents at the root of your Shaarli installation will prevent honest web crawlers from indexing each and every link and Daily page from a Shaarli instance, thus getting rid of a certain amount of unsollicited network traffic.

    User-agent: *
    Disallow: /

See:

- http://www.robotstxt.org/
- http://www.robotstxt.org/robotstxt.html
- http://www.robotstxt.org/meta.html