Networking and Security
Network Configuration and Management
- What you Need to Know
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Network Interface Configuration
- Network interface management with ip and ifconfig commands
- Static and dynamic IP address configuration (DHCP)
- Network interface bonding, bridging, and VLAN configuration
- Resources:
- Network Configuration Guide - Red Hat - Comprehensive network configuration
- IP Command Tutorial - Linuxize - Modern network interface management
- Network Bonding Guide - DigitalOcean - Advanced networking concepts
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Routing and Gateway Configuration
- Routing table management and static route configuration
- Default gateway setup and multi-homed systems
- Policy-based routing and advanced routing concepts
- Resources:
- Linux Routing Tutorial - GeeksforGeeks - Routing configuration and management
- Advanced Routing - TLDP - Advanced routing techniques
- Policy Routing Guide - Linux Foundation - Policy-based routing implementation
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Network Services Configuration
- DHCP client and server configuration
- DNS client configuration and name resolution
- Network Time Protocol (NTP) setup and synchronization
- Resources:
- DHCP Configuration - Ubuntu - DHCP client and server setup
- DNS Configuration Guide - Red Hat - DNS setup and troubleshooting
- NTP Configuration - DigitalOcean - Time synchronization setup
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Network Troubleshooting and Diagnostics
- What you Need to Know
-
Network Connectivity Testing
- Ping, traceroute, and path analysis tools
- Network connectivity troubleshooting methodologies
- Bandwidth testing and network performance analysis
- Resources:
- Network Troubleshooting Guide - Tecmint - Essential network diagnostic tools
- Network Performance Testing - Linux Journal - Bandwidth and performance analysis
- Traceroute Analysis - NANOG - Path analysis and troubleshooting
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Network Traffic Analysis
- Packet capture and analysis with tcpdump and Wireshark
- Network traffic monitoring and flow analysis
- Protocol analysis and network forensics
- Resources:
- Tcpdump Tutorial - DigitalOcean - Packet capture and analysis
- Wireshark Documentation - Network protocol analysis
- Network Forensics Guide - SANS - Network traffic analysis techniques
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Network Service Debugging
- Service port scanning and availability testing
- Network service configuration troubleshooting
- SSL/TLS certificate validation and debugging
- Resources:
- Nmap Tutorial - Linux Hint - Network discovery and port scanning
- Service Debugging - Red Hat - Network service troubleshooting
- SSL/TLS Testing - SSL Labs - Certificate validation and testing
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Firewall Configuration and Management
- What you Need to Know
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Iptables Firewall Management
- Iptables rules, chains, and tables configuration
- Packet filtering, NAT, and port forwarding
- Firewall rule optimization and performance tuning
- Resources:
- Iptables Tutorial - DigitalOcean - Comprehensive iptables configuration
- Iptables Guide - Netfilter - Official netfilter documentation
- Advanced Iptables - TLDP - Advanced firewall configuration
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Firewalld and Modern Firewall Management
- Firewalld zones, services, and rich rules
- Dynamic firewall management and runtime configuration
- Integration with systemd and network services
- Resources:
- Firewalld Guide - Red Hat - Modern firewall management
- Firewalld Tutorial - Linuxize - Firewalld configuration examples
- UFW Tutorial - Ubuntu - Uncomplicated Firewall setup
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Network Security Policies
- Security policy development and implementation
- Network segmentation and access control
- Intrusion detection and prevention systems
- Resources:
- Network Security Policy - NIST - Network security guidelines
- Network Segmentation - SANS - Network isolation strategies
- IDS/IPS Configuration - Snort - Intrusion detection systems
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SSH and Remote Access Security
- What you Need to Know
-
SSH Server Configuration and Hardening
- SSH daemon configuration and security settings
- Key-based authentication and certificate management
- SSH tunneling and port forwarding techniques
- Resources:
- SSH Hardening Guide - DigitalOcean - SSH security configuration
- SSH Key Management - Red Hat - SSH authentication and keys
- SSH Tunneling Tutorial - Linux Journal - Advanced SSH techniques
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VPN Configuration and Management
- OpenVPN server and client configuration
- WireGuard VPN setup and management
- IPSec VPN configuration and troubleshooting
- Resources:
- OpenVPN Tutorial - DigitalOcean - OpenVPN server setup
- WireGuard Guide - WireGuard - Modern VPN configuration
- IPSec Configuration - Red Hat - IPSec VPN setup
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Multi-Factor Authentication
- Two-factor authentication implementation
- LDAP and Active Directory integration
- Certificate-based authentication systems
- Resources:
- 2FA Setup Guide - DigitalOcean - Multi-factor authentication
- LDAP Integration - Red Hat - Directory service integration
- Certificate Authentication - OpenSSL - Certificate-based security
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System Security Hardening
- What you Need to Know
-
Access Control and Permissions
- Advanced file permissions and Access Control Lists (ACLs)
- SELinux and AppArmor mandatory access controls
- User and group security policies
- Resources:
- ACL Tutorial - Red Hat - Advanced permission management
- SELinux Guide - Red Hat - Mandatory access control with SELinux
- AppArmor Tutorial - Ubuntu - Application security profiles
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System Auditing and Monitoring
- System audit configuration with auditd
- Log monitoring and security event detection
- File integrity monitoring and change detection
- Resources:
- Linux Auditing - Red Hat - System audit configuration
- AIDE Tutorial - DigitalOcean - File integrity monitoring
- Log Analysis - Elastic - Log monitoring and analysis
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Vulnerability Assessment and Patch Management
- Vulnerability scanning and assessment tools
- Security patch management and testing
- Security baseline configuration and compliance
- Resources:
- Vulnerability Scanning - OpenVAS - Open source vulnerability assessment
- Patch Management - Red Hat - Security update management
- Security Benchmarks - CIS - Security configuration standards
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Encryption and PKI Management
- What you Need to Know
-
File and Disk Encryption
- File-level encryption with GnuPG and OpenSSL
- Full disk encryption with LUKS and dm-crypt
- Encrypted file systems and secure storage
- Resources:
- GnuPG Tutorial - GNU - File encryption and digital signatures
- LUKS Encryption - Red Hat - Full disk encryption
- EncFS Tutorial - DigitalOcean - Encrypted file systems
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Certificate Management and PKI
- SSL/TLS certificate creation and management
- Certificate Authority (CA) setup and operation
- Certificate revocation and lifecycle management
- Resources:
- OpenSSL Tutorial - DigitalOcean - Certificate management with OpenSSL
- PKI Implementation - Red Hat - Public Key Infrastructure
- Let's Encrypt - Certbot - Automated certificate management
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Secure Communication Protocols
- SSL/TLS configuration and optimization
- Secure email and messaging systems
- Encrypted network protocols and services
- Resources:
- SSL/TLS Configuration - Mozilla - SSL/TLS best practices
- Secure Email - Postfix - Email encryption configuration
- Protocol Security - OWASP - Secure protocol implementation
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Network Services Security
- What you Need to Know
-
Web Server Security
- Apache and Nginx security configuration
- Web application firewall (WAF) implementation
- SSL/TLS termination and security headers
- Resources:
- Apache Security - Apache Foundation - Apache security configuration
- Nginx Security - Nginx - Nginx security and SSL configuration
- Web Security - OWASP - Web application security
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Database Security
- Database access control and authentication
- Database encryption and secure connections
- Database auditing and compliance monitoring
- Resources:
- MySQL Security - Oracle - MySQL security configuration
- PostgreSQL Security - PostgreSQL - PostgreSQL security features
- Database Hardening - NIST - Database security guidelines
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Mail Server Security
- Mail server hardening and spam prevention
- Email encryption and digital signatures
- Mail relay security and authentication
- Resources:
- Postfix Security - Postfix - Mail server security
- Dovecot Security - Dovecot - IMAP/POP3 security
- Email Security - SANS - Email system security
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Intrusion Detection and Incident Response
- What you Need to Know
-
Host-Based Intrusion Detection
- HIDS configuration and rule management
- Real-time monitoring and alerting systems
- Behavioral analysis and anomaly detection
- Resources:
- OSSEC Tutorial - DigitalOcean - Host-based intrusion detection
- Fail2ban Configuration - Linuxize - Intrusion prevention system
- Tripwire Guide - Tripwire - File integrity monitoring
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Network Intrusion Detection
- Network-based IDS configuration and deployment
- Traffic analysis and signature-based detection
- Network forensics and incident investigation
- Resources:
- Suricata IDS - Suricata - Network intrusion detection system
- Snort Configuration - Snort - Network intrusion prevention
- Network Forensics - SANS - Network incident analysis
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Incident Response and Recovery
- Incident response planning and procedures
- Digital forensics and evidence collection
- System recovery and business continuity
- Resources:
- Incident Response Guide - NIST - Incident handling procedures
- Digital Forensics - SANS - Forensic investigation techniques
- Disaster Recovery - Red Hat - System recovery procedures
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Compliance and Security Frameworks
- What you Need to Know
-
Security Standards and Frameworks
- CIS Controls and security benchmarks
- NIST Cybersecurity Framework implementation
- ISO 27001 and security management systems
- Resources:
- CIS Controls - Center for Internet Security - Security control framework
- NIST Framework - NIST - Cybersecurity framework
- ISO 27001 Guide - ISO - Information security management
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Compliance Monitoring and Reporting
- Automated compliance checking and validation
- Security metrics and reporting systems
- Audit trail management and documentation
- Resources:
- OpenSCAP Tutorial - Red Hat - Security compliance scanning
- Compliance Automation - Chef InSpec - Infrastructure compliance testing
- Security Metrics - SANS - Security measurement and reporting
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Regulatory Compliance
- GDPR, HIPAA, and PCI DSS compliance requirements
- Data protection and privacy controls
- Compliance documentation and evidence management
- Resources:
- GDPR Compliance - GDPR.eu - Data protection regulation
- HIPAA Security - HHS - Healthcare data protection
- PCI DSS Guide - PCI Security - Payment card industry security
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Security Automation and DevSecOps
- What you Need to Know
-
Security Testing Automation
- Automated vulnerability scanning and assessment
- Security testing integration in CI/CD pipelines
- Infrastructure security testing and validation
- Resources:
- Security Testing - OWASP - Application security testing
- DevSecOps Pipeline - GitLab - Security integration in DevOps
- Infrastructure Testing - Test Kitchen - Infrastructure security testing
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Security Configuration Management
- Automated security hardening and configuration
- Security policy as code implementation
- Continuous compliance monitoring and remediation
- Resources:
- Ansible Security - Red Hat - Automated security configuration
- Terraform Security - HashiCorp - Infrastructure security automation
- Policy as Code - Open Policy Agent - Policy automation framework
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Security Monitoring and Analytics
- Security information and event management (SIEM)
- Threat intelligence integration and analysis
- Security orchestration and automated response
- Resources:
- ELK Security - Elastic - Security analytics platform
- SIEM Implementation - Splunk - Security information management
- Threat Intelligence - MISP - Threat intelligence platform
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Ready to Continue? Complete your Linux Engineering journey with Module 5: Server Management and DevOps to master web servers, databases, containerization, and modern deployment practices!