* https://owasp.org/www-community/attacks/Denial_of_Service[OWASP] - Denial of Service
* https://www.linux.org/docs/man8/pam_limits.html[Linux.org] - pam_limits - PAM module to limit resources
* https://access.redhat.com/solutions/1257953[RedHat] - How to set limits for services in RHEL and systemd 