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Memcached is an open-source memory caching system that you can use to speed up web applications and dynamic websites. Memcached works by storing frequently accessed data in RAM hence reducing the time an application reads data from databases, files or API interfaces. If your website, web application or API server has high read calls and infrequent writes, Memcached can be a great tool for you.  Install Memcached and Client Library  # sudo apt install memcached libmemcached-tools # sudo systemctl status memcached Securing Memcached Configuration Settings # vi /etc/memcached.conf -d -vv -m 256 -p 11211 -u memcache -l 127.0.0.1 add the following option to the bottom of this file: -U 0 Restart your Memcached service to apply your changes: # sudo systemctl restart memcached Verify that Memcached is currently bound to the local interface and listening only for TCP connections by typing: # sudo netstat -plunt To check that Memcached is up and running, type the following: # memcstat --servers

It is important to secure your Memcached servers, Because systems like Memcached can contribute to denial of service attacks if improperly configured. We will explain how to install and secure your Memcached server on CentOS 7 Linux distribution. These given instructions also work on RHEL and Fedora Linux. First, update the system: # yum update -y Next, install the official Memcached package memcached; as well as libmemcached, which provides several utilities to work with Memcached: # yum install memcached libmemcached Note: libmemcached – a client library that offers a couple of tools to manage your Memcached server. Securing Memcached Configuration Settings for Local Access Only:   To make assure that installed Memcached service is listening on the 127.0.0.1 local interface, We will also disable the UDP listener. Both of these actions will protect our server from denial of service To do this, we will add the -U 0 parameter to our OPTIONS variable. The file in full should look l