Similar to Firewalld

CAdES (computing)

CERT Coordination Center

Cisco ASA

Computer emergency response team

Datagram Transport Layer Security

Diameter (protocol)

Digital Signature Algorithm

Distributed Sender Blackhole List

DNS over HTTPS

DNS over TLS

Domain Name System Security Extensions

DNSCrypt

DNS spoofing

Denial-of-service attack

ElGamal signature scheme

Forward secrecy

HTTP Strict Transport Security

HTTPS

HTTP header injection

Interactive Connectivity Establishment

IPsec

IP address spoofing

IP address blocking

NAT traversal

NTLM