Question Is it safe to use Memcached in a shared Plesk hosting environment?

[ranjithkr]

Server operating system version

CentOS Linux release 7.9.2009 (Core)

Plesk version and microupdate number

Plesk Obsidian 18.0

Hello,

I have been asked to install memcached and php memcache extension on a plesk shared hosting server. Is it safe to use memcached in a shared plesk hosting environment ?

Used the below steps to configure memcahe.

https://support.plesk.com/hc/en-us/articles/12377651968023-How-to-install-uninstall-memcached-PHP-extension-for-Plesk-PHP-handlers

I read somewhere that it can cause security problems like view the cache of the other user, edit the cache, etc.

 

[Kaspar@Plesk]

Is it safe to use memcached in a shared plesk hosting environment ?

It is not safe when using a single daemon (as described in the article you linked to). There is no way to isolate data in memcache and there is noway to authenticate to memcached unless running multiple daemon on different ports.

 

[ranjithkr]

But is it practical to run multiple daemons on different ports in a shared plesk environment with more than 100+web applications ? Is there any alternative solutions ?