Introduction
- Who is this book for?
- What is Linux?
Chapter 1: Updates and SSH
- OpenSSH
- Update and upgrade
- Summary
Chapter 2: SSH Connectivity
- SSH key pairs
- Secure sshd_config
- What is 2FA?
Chapter 3: Access
- Limit Root login
- NTP client
Chapter 4: Firewalls
- What is a Firewall?
- iptables
- UFW firewall
- psad
Chapter 5: Blocking bad traffic
- fail2ban
- psad
Chapter 6: Monitoring
- Syslog
- Syslog on Linux
- tcpdump