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
- Initial State: [Initial network configuration]
- Required Outcome: [Desired network setup]

### Solution Steps
1. Check Current Network Configuration
   ```bash
   # Check network interfaces
   ip addr show
   
   # Check routing
   ip route show
   ```
   [Explanation of current state]

2. Configure Network Interface
   ```bash
   # Network configuration commands
   nmcli connection modify ...
   ```
   [Explanation of configuration]

3. Apply and Verify Changes
   ```bash
   # Apply changes
   nmcli connection up ...
   ```
   [Explanation of changes]

### Verification
```bash
# Test connectivity
ping -c 4 gateway_ip
ping -c 4 8.8.8.8

# Check DNS resolution
nslookup example.com
```

### Key Learnings
- Understanding of network configuration
- Troubleshooting methodology
- NetworkManager usage

## 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: [To be filled]
- Initial State: [To be filled]
- Required Outcome: [To be filled]

### Solution Steps
[Your solution will be added here]

## 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: [To be filled]
- Initial State: [To be filled]
- Required Outcome: [To be filled]

### Solution Steps
[Your solution will be added here]