#00 Security
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Securing the IP Networks
IPTABLES
Stateful firewall for netfilter framework
Let's Encrypt
Free RSA X.509 certificates from Let's Encrypt
WAF
Web Application Firewall based on Apache/ModSecurity/OWASP CRS stack
CrowdSec
An open-source and participative security solution offering crowdsourced server detection and protection against malicious IPs