it-knowledge/src/solutions/networking.md

Network Solutions [🌐]

This section documents my solutions to networking scenarios, including network configuration, troubleshooting, and security.

Scenario Tags

Tag	Description
[v1-S7]	Network Configuration - Practice Scenarios v1
[v2-S7]	Network and Storage Troubleshooting - Practice Scenarios v2
[v3-S7]	Network Services Configuration - Practice Scenarios v3

Scenario: [v1-S7] Network Interface Configuration

Original Problem

From Practice Scenarios v1, Scenario 7:

1. Configure static IPv4 address: 192.168.1.100/24
2. Configure static IPv6 address: 2001:db8:1234:5678::100/64
3. Set hostname to 'rhcsa.example.com'
4. Configure DNS resolution using /etc/resolv.conf
5. Implement network access restrictions using firewalld zones

Environment

• OS Version: RHEL/Rocky Linux 8.x
• Initial State: DHCP-configured network interface
• Required Outcome: Properly configured static network settings with hostname and firewall zones

Solution Steps

1. Check Current Network Configuration

   # Check network interfaces
   ip addr show
   
   # Check routing
   ip route show
   

   [My explanation will go here after completing the exercise]

2. Configure Network Interface

   # Network configuration commands
   # To be filled with my solution
   

   [My explanation will go here after completing the exercise]

3. Apply and Verify Changes

   # Apply changes
   # To be filled with my solution
   

   [My explanation will go here after completing the exercise]

Verification

# Test connectivity
# To be filled with my verification steps

Key Learnings

• [To be filled after completing the exercise]

Skills Demonstrated

• Network Configuration
• DNS Management
• Network Troubleshooting
• Network Security

Scenario: [v2-S7] Network and Storage Troubleshooting

Original Problem

From Practice Scenarios v2, Scenario 7:

1. Diagnose and repair failed NFS mounts
2. Recover from a failed LVM configuration
3. Fix network connectivity issues
4. Restore correct SELinux contexts after file restoration
5. Configure autofs for user home directories
6. Set up network teaming for redundancy

Environment

• OS Version: RHEL/Rocky Linux 8.x
• Initial State: System with various network and storage issues
• Required Outcome: Fully functional system with resolved issues and properly configured network

Solution Steps

[To be filled when I complete this exercise]

Scenario: [v3-S7] Network Services Configuration

Original Problem

From Practice Scenarios v3, Scenario 7:

1. Configure network with:
   • Bonded interface with active-backup
   • VLAN configuration
   • Static routes
2. Set up DNS resolution with:
   • Multiple DNS servers
   • Search domains
   • Local host entries
3. Implement network security with:
   • TCP Wrappers
   • IPtables rules
   • Fail2ban configuration

Environment

• OS Version: RHEL/Rocky Linux 8.x
• Initial State: Basic network configuration with single interface
• Required Outcome: Advanced network configuration with bonding, VLANs, and security features

Solution Steps

[To be filled when I complete this exercise]