IT Security

• IT Security Overview
  • Benefits of a Standard Identity Protocol
  • Are certificates better than passwords?
  • The Three As
• A Glossary of Security Terms
• Public Key Infrastructure
  • PKI Glossary
  • OpenSSL commands
  • PKI Concepts
  • Setting up a Private PKI
  • Alternate way for PKI Setup
  • root-ca.conf
• Generating HTTPS Certificates
  • Self Signed HTTPS key
  • Let’s Encrypt Certificate
  • Installing NGINX and the site
  • Installing Certbot and apply for the certificate
• Cross Origin Resource Sharing (CORS)
  • Introduction
  • Concepts
  • CORS Server Options
• JSON Web Token (JWT)
  • JWT Concepts
  • JWT Best Practises
• Kerberos
  • An Overview of Kerberos
  • Kerberos Glossary
  • Kerberos Sequence Diagrams

Checking SSH login failures

sudo grep "Failed password" /var/log/auth.log