Hackproof your Linux server – Gabriel Avramescu

Salepage link: At HERE. Archive: https://archive.is/wip/uPOKO

Linux Servers provide many user transactions, which are constantly vulnerable to security threats, due to data sensitivity. To bring an application up and running on a server is an important thing, but without taking security measures, it can end up in a disaster. Although Linux is immune to some of the dangers Windows servers encounters, Internet is still a dangerous place. Therefore it’s important to apply security measures to prevent malicious attacks like brute force attack, etc.

This course was designed to show some practical tips on how to protect your server, that once applied, they will increase the level of security on your system and decrease the chances of it being compromised.

Along with the video lectures, you will also find exercises to help you improve your hands-on experience.

Course Curriculum

Introduction

• Tips & Tricks (11:14)

GRUB Protection and Security Patching

• Intro
• Protect GRUB with password (3:12)
• Exercise – Protect GRUB with password
• Security Patching (5:00)
• Third-party packages

User Management and PAM

• What is PAM? (4:50)
• Check if a service uses PAM (1:23)
• Common-auth file explained (2:26)
• Restrict users from using the same old passwords (3:25)
• Exercise – Restrict users from using the same old password
• Set password expiration for users (2:48)
• Enforce strong passwords (5:15)
• Exercise – Enforce strong passwords
• sudo access (7:50)
• Disable root login (2:42)
• /etc/securetty file (1:05)
• Limit scheduling jobs with cron (5:18)
• PAM Quiz

Control remote connections

• SSH banner before & after the login (3:09)
• SSH keys
• Exercise – Generate ssh keys
• Server’s fingerprint (2:17)
• Disable root connection (1:02)
• Blacklist users from ssh (6:25)
• SSH Quiz

Firewalls & TCP Wrappers

• Iptables (5:45)
• Iptables-persistent (4:47)
• Exercise – Iptables
• Fail2ban (10:39)
• fail2ban-client command (3:59)
• TCP Wrappers (10:47)
• Fail2ban Quiz

Auditing & Virus Scanning

• Lynis audit tool (6:58)
• Exercise – Lynis audit tool
• Virus scanning – ClamAV (5:26)

Final Section

• Conclusions
• Final Quiz