# OpenWRT and AdGuard Home Configuration Guide

## Network Overview

**Current Setup:**
- Router: 10.0.0.254 (TPLink)
- DNS: 10.0.0.55 (HomeAssistant/AdGuard)

**New Setup:**
- OpenWRT Router: 10.0.0.246
- New AdGuard: 10.0.0.245
- DHCP Range: 10.0.0.1 - 10.0.0.200

---

## Part 1: Initial OpenWRT Setup

### 1.1 First Login and Basic Configuration

1. **Connect to OpenWRT:**
   - Connect via Ethernet to LAN port
   - Default IP is usually `192.168.1.1`
   - Access via browser: `http://192.168.1.1`
   - Default login: `root` (no password initially)

2. **Set Root Password:**
   ```
   System → Administration → Router Password
   ```
   Set a strong password immediately.

### 1.2 Configure LAN Interface

1. **Navigate to Network → Interfaces**

2. **Edit LAN interface:**
   - Protocol: `Static address`
   - IPv4 address: `10.0.0.246`
   - IPv4 netmask: `255.255.255.0`
   - IPv4 gateway: `10.0.0.254` (your main TPLink router)
   - Use custom DNS servers: `10.0.0.245` (your new AdGuard)
   - Click "Save" then "Save & Apply"

3. **Reconnect:**
   - Your OpenWRT will now be at `http://10.0.0.246`
   - You may need to manually set your PC to 10.0.0.x network temporarily

---

## Part 2: DHCP Server Configuration

### 2.1 Basic DHCP Settings

1. **Navigate to Network → DHCP and DNS**

2. **Server Settings (General Settings tab):**
   - Check "Authoritative" if this will be the only DHCP server on this network
   - DNS forwardings: `10.0.0.245`
   - Click "Save"

3. **DHCP Pool Settings:**
   - Navigate to Network → Interfaces → LAN → Edit → DHCP Server tab
   - Check "Enable this DHCP server"
   - Start: `1`
   - Limit: `200`
   - Lease time: `12h` (or your preference)

### 2.2 Static Leases Configuration

1. **Navigate to Network → DHCP and DNS → Static Leases tab**

2. **Add Static Leases:**
   - Click "Add"
   - Hostname: Device name (e.g., "homeassistant")
   - MAC Address: Device MAC
   - IPv4 Address: Desired IP (e.g., 10.0.0.55)
   - Lease time: Leave empty for infinite
   - Click "Save" then "Save & Apply"

Example static leases you might want:
```
10.0.0.55  - HomeAssistant/Current AdGuard
10.0.0.245 - New AdGuard
10.0.0.246 - OpenWRT itself
10.0.0.254 - TPLink Router
```

### 2.3 DHCP Options for Custom DNS per Client

To set different DNS servers for specific clients, you'll need to use DHCP options.

**Option 1: Via LuCI (GUI)**
1. Navigate to Network → DHCP and DNS → Static Leases
2. When adding/editing a static lease, you can add DHCP options
3. Add option `6` with comma-separated DNS IPs: `8.8.8.8,8.8.4.4`

**Option 2: Via Config File (more flexible)**

SSH into OpenWRT and edit `/etc/config/dhcp`:

```bash
vi /etc/config/dhcp
```

Add configuration like this:

```
config host
    option name 'special-device'
    option mac 'AA:BB:CC:DD:EE:FF'
    option ip '10.0.0.100'
    option dns '8.8.8.8 8.8.4.4'

config host
    option name 'standard-device'
    option mac '11:22:33:44:55:66'
    option ip '10.0.0.101'
    # Uses default DNS (AdGuard at 10.0.0.245)
```

Then restart dnsmasq:
```bash
/etc/init.d/dnsmasq restart
```

---

## Part 3: Access Control Configuration

### 3.1 Install Required Packages

SSH into your OpenWRT router and install firewall management tools:

```bash
opkg update
opkg install luci-app-firewall
opkg install iptables-mod-extra
```

### 3.2 Method 1: MAC Address Filtering (Simple Block)

**Via LuCI:**
1. Navigate to Network → Wireless (if WiFi) or DHCP
2. For each device you want to block:
   - Add to static lease with specific IP
   - Then create firewall rule to block that IP

**Create Firewall Rule:**
1. Network → Firewall → Traffic Rules
2. Add new rule:
   - Name: `Block Device Name`
   - Source zone: `lan`
   - Source MAC or IP: `10.0.0.XX` or `AA:BB:CC:DD:EE:FF`
   - Destination zone: `wan`
   - Action: `reject`

### 3.3 Method 2: IP Sets for Group Management (Advanced)

This allows you to easily manage groups of blocked devices.

**SSH Configuration:**

Create custom firewall rules in `/etc/firewall.user`:

```bash
vi /etc/firewall.user
```

Add:
```bash
# Create IP set for blocked devices
ipset create blocked_devices hash:ip -exist

# Add devices to blocked list (can be managed dynamically)
ipset add blocked_devices 10.0.0.100 -exist
ipset add blocked_devices 10.0.0.101 -exist

# Block internet access for devices in the set
iptables -I FORWARD -m set --match-set blocked_devices src -o eth1 -j REJECT
```

Apply:
```bash
/etc/init.d/firewall restart
```

**To add/remove devices from block list:**
```bash
# Block a device
ipset add blocked_devices 10.0.0.150

# Unblock a device
ipset del blocked_devices 10.0.0.150

# List blocked devices
ipset list blocked_devices
```

### 3.4 Method 3: Parental Controls Package (Easiest GUI)

Install parental controls:
```bash
opkg update
opkg install luci-app-advanced-reboot
opkg install luci-app-simple-adblock  # Optional, if not using AdGuard
```

For better device management, install:
```bash
opkg install luci-app-nlbwmon  # Network bandwidth monitoring
```

This gives you per-device traffic monitoring and easier access control.

---

## Part 4: AdGuard Home Setup (10.0.0.245)

### 4.1 Installation Options

**Option A: Docker (Recommended if you have Docker)**
```bash
docker run -d \
  --name adguardhome \
  --restart unless-stopped \
  -v /path/to/adguard/work:/opt/adguardhome/work \
  -v /path/to/adguard/conf:/opt/adguardhome/conf \
  -p 10.0.0.245:53:53/tcp \
  -p 10.0.0.245:53:53/udp \
  -p 10.0.0.245:3000:3000/tcp \
  adguard/adguardhome
```

**Option B: Native Linux Install**
```bash
curl -s -S -L https://raw.githubusercontent.com/AdguardTeam/AdGuardHome/master/scripts/install.sh | sh -s -- -v
```

**Option C: Windows**
Download from: https://github.com/AdguardTeam/AdGuardHome/releases

### 4.2 Initial AdGuard Configuration

1. **Access Setup:** `http://10.0.0.245:3000`

2. **Setup Wizard:**
   - Admin Web Interface: Port `3000` (or your choice)
   - DNS Server: Port `53`
   - Admin credentials: Set username and password

3. **Configure Upstream DNS:**
   - Navigate to Settings → DNS settings
   - Add upstream DNS servers:
     ```
     https://dns.cloudflare.com/dns-query
     https://dns.google/dns-query
     1.1.1.1
     8.8.8.8
     ```
   - Enable parallel queries for better performance
   - Set rate limit: 20 (adjust based on needs)

4. **Configure Private Reverse DNS:**
   - Add your local network: `10.0.0.0/24`
   - Enable "Use private reverse DNS resolvers"

5. **Enable Query Logging:**
   - Settings → General settings
   - Query logs retention: 7 days (or your preference)
   - Statistics retention: 90 days

### 4.3 Blocklists Configuration

Add recommended blocklists:

1. Navigate to Filters → DNS blocklists
2. Add these lists:

```
# OISD Big List (comprehensive)
https://big.oisd.nl/

# AdGuard DNS filter
https://adguardteam.github.io/AdGuardSDNSFilter/Filters/filter.txt

# Steven Black's Unified Hosts
https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts

# Hagezi's Pro DNS Blocklist
https://raw.githubusercontent.com/hagezi/dns-blocklists/main/wildcard/pro-onlydomains.txt
```

3. Click "Save" and "Apply"

### 4.4 Custom Filtering Rules

For local network DNS resolution, add custom rules:

1. Navigate to Filters → DNS rewrites
2. Add entries:
   ```
   openwrt.local → 10.0.0.246
   adguard.local → 10.0.0.245
   homeassistant.local → 10.0.0.55
   router.local → 10.0.0.254
   ```

---

## Part 5: Integration and Testing

### 5.1 Point OpenWRT to AdGuard

Ensure OpenWRT is configured to use AdGuard:

1. Network → Interfaces → LAN → Edit
2. Advanced Settings tab:
   - Use custom DNS servers: `10.0.0.245`
3. Network → DHCP and DNS:
   - DNS forwardings: `10.0.0.245`

### 5.2 Testing DHCP

1. **Connect a test device** to the OpenWRT network
2. **Check IP assignment:**
   ```bash
   # On Windows
   ipconfig /all
   
   # On Linux
   ip addr show
   ```
3. **Verify you receive:**
   - IP in range 10.0.0.1-200
   - DNS server: 10.0.0.245
   - Gateway: 10.0.0.246 or 10.0.0.254

### 5.3 Testing DNS Resolution

```bash
# On Windows
nslookup google.com 10.0.0.245

# On Linux
dig @10.0.0.245 google.com
```

### 5.4 Testing Access Control

1. Add a device to block list
2. Try to access internet from that device
3. Verify connection is blocked
4. Check OpenWRT firewall logs: Status → Firewall

### 5.5 Monitor AdGuard

1. Access AdGuard dashboard: `http://10.0.0.245:3000`
2. Check:
   - Query log shows requests
   - Blocked requests are being filtered
   - All devices are showing up

---

## Part 6: Advanced Configuration

### 6.1 Create Easy Device Management Script

Save this script on OpenWRT as `/root/device-control.sh`:

```bash
#!/bin/sh

# Device Access Control Script for OpenWRT

ACTION=$1
DEVICE_IP=$2
DEVICE_NAME=$3

case $ACTION in
  block)
    ipset add blocked_devices $DEVICE_IP -exist
    echo "Blocked: $DEVICE_NAME ($DEVICE_IP)"
    ;;
  unblock)
    ipset del blocked_devices $DEVICE_IP
    echo "Unblocked: $DEVICE_NAME ($DEVICE_IP)"
    ;;
  list)
    echo "Currently blocked devices:"
    ipset list blocked_devices
    ;;
  status)
    ipset test blocked_devices $DEVICE_IP && echo "$DEVICE_IP is BLOCKED" || echo "$DEVICE_IP is ALLOWED"
    ;;
  *)
    echo "Usage: $0 {block|unblock|list|status} [IP] [NAME]"
    exit 1
    ;;
esac
```

Make executable:
```bash
chmod +x /root/device-control.sh
```

Usage:
```bash
# Block a device
./device-control.sh block 10.0.0.100 "Kids Tablet"

# Unblock
./device-control.sh unblock 10.0.0.100 "Kids Tablet"

# List all blocked
./device-control.sh list

# Check status
./device-control.sh status 10.0.0.100
```

### 6.2 Setup Scheduled Device Controls (Optional)

To block devices at specific times (e.g., bedtime):

```bash
# Edit crontab
crontab -e
```

Add entries:
```cron
# Block kids devices at 9 PM
0 21 * * * /root/device-control.sh block 10.0.0.100 "Kids Tablet"

# Unblock at 7 AM
0 7 * * * /root/device-control.sh unblock 10.0.0.100 "Kids Tablet"
```

### 6.3 Backup Configurations

**OpenWRT Backup:**
1. System → Backup / Flash Firmware
2. Click "Generate archive"
3. Save the `.tar.gz` file

**AdGuard Backup:**
1. Settings → General settings
2. Scroll to "Export settings"
3. Click "Download" to save YAML config

---

## Part 7: Network Topology Options

### Option A: OpenWRT as Router (Full Gateway)
```
Internet → TPLink (10.0.0.254) → OpenWRT (10.0.0.246) → Devices
                                      ↓
                                 AdGuard (10.0.0.245)
```
- Requires routing configuration
- More complex but more control

### Option B: OpenWRT as DHCP/Access Point (Recommended for your setup)
```
Internet → TPLink (10.0.0.254) ← Gateway for all
              ↓
         OpenWRT (10.0.0.246) - DHCP Server + Access Control
              ↓
         AdGuard (10.0.0.245) - DNS Filtering
              ↓
         Devices (10.0.0.1-200)
```
- OpenWRT provides DHCP and access control
- TPLink remains gateway
- AdGuard handles DNS
- Simpler setup, which I've documented above

---

## Troubleshooting

### DHCP not working
```bash
# Check DHCP status
/etc/init.d/dnsmasq status

# Restart DHCP
/etc/init.d/dnsmasq restart

# Check logs
logread | grep -i dhcp
```

### DNS not resolving
```bash
# Test DNS on OpenWRT itself
nslookup google.com 10.0.0.245

# Check if AdGuard is running
# On AdGuard server
netstat -tulpn | grep :53
```

### Access control not working
```bash
# Check firewall rules
iptables -L FORWARD -v -n

# Check ipset
ipset list blocked_devices

# Reload firewall
/etc/init.d/firewall restart
```

### Can't access OpenWRT web interface
```bash
# SSH in and check
netstat -tulpn | grep :80

# Restart web interface
/etc/init.d/uhttpd restart
```

---

## Quick Reference Commands

```bash
# OpenWRT
/etc/init.d/network restart    # Restart network
/etc/init.d/dnsmasq restart    # Restart DHCP/DNS
/etc/init.d/firewall restart   # Restart firewall
logread                         # View system logs

# View DHCP leases
cat /tmp/dhcp.leases

# View current connections
cat /proc/net/nf_conntrack

# Monitor traffic
tcpdump -i br-lan port 53      # Monitor DNS traffic
```

---

## Next Steps

1. **Set up OpenWRT first** with static IP 10.0.0.246
2. **Configure DHCP** with your range and static leases
3. **Install and configure AdGuard** on 10.0.0.245
4. **Point OpenWRT DNS** to AdGuard
5. **Set up access control** using one of the methods above
6. **Test thoroughly** with various devices
7. **Create backups** of both configurations

---

## Security Recommendations

1. **Change default passwords** on both OpenWRT and AdGuard
2. **Enable HTTPS** for OpenWRT web interface (System → Administration → HTTP(S) Access)
3. **Disable SSH password authentication**, use keys instead
4. **Keep OpenWRT updated**: System → Software → Update lists
5. **Enable AdGuard statistics** to monitor unusual activity
6. **Set up firewall rules** to prevent LAN → LAN attacks if needed
7. **Regular backups** of both configurations

---

## Additional Resources

- OpenWRT Documentation: https://openwrt.org/docs/start
- AdGuard Home Documentation: https://github.com/AdguardTeam/AdGuardHome/wiki
- OpenWRT Forum: https://forum.openwrt.org/
- AdGuard Forum: https://forum.adguard.com/