Secure memcached server to avoid DDoS amplification attacks

Posted on in Categories , , last updated March 5, 2018

I am worried that my Memcached server used for DDoS amplification attacks. How do I secure Memcached server on Linux or Unix-like system to avoid an attacker to exploit my Memcached services as an amplification vector, causing unexpected volumes of traffic to be sent to targeted networks?
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memcached: Failed To Set rlimit For Open Files Error and Solution

Posted on in Categories , , last updated October 11, 2011

I‘m using RHEL 6 / CentOS 6.x and install the memcached server. However, whey I try to start the server using service memcached start command, I get the following error:

Starting memcached: failed to set rlimit for open files. Try running as root or requesting smaller maxconns value. [FAILED]

How do I fix this problem?