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.phpscript 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
 - Apache (with user dirs enabled): 
 - make sure the script is readable by the web server user/group (usually, 
www,www-dataorhttpd) - 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:
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]
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]
before = common.conf
[Definition]
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