Memcrashed (CVE-2018-1000115), a vulnerability of popular cache Memcached, which cause a massive DDOS attack of 1.7TBps can be fixed by simple configuration. Although a patch has been released. But if you do not want to reinstall you can make changes of a configuration file located in
Open the file and change the Options
OPTIONS="-l 127.0.0.1" # -l small character 'L'