BIND Installation Guide

# Install EPEL repository if needed
sudo dnf install -y epel-release

# Install bind
sudo dnf install -y bind bind-utils, dnssec-tools

# Enable and start service
sudo systemctl enable --now named

# Configure firewall
sudo firewall-cmd --permanent --add-service=bind
sudo firewall-cmd --reload

# Verify installation
bind --version || systemctl status named

# Update package index
sudo apt update

# Install bind
sudo apt install -y bind bind-utils, dnssec-tools

# Enable and start service
sudo systemctl enable --now named

# Configure firewall
sudo ufw allow 53

# Verify installation
bind --version || systemctl status named

# Install bind
sudo pacman -S bind

# Enable and start service
sudo systemctl enable --now named

# Verify installation
bind --version || systemctl status named

# Install bind
apk add --no-cache bind

# Enable and start service
rc-update add named default
rc-service named start

# Verify installation
bind --version || rc-service named status

# Install bind
sudo zypper install -y bind bind-utils, dnssec-tools

# Enable and start service
sudo systemctl enable --now named

# Configure firewall
sudo firewall-cmd --permanent --add-service=bind
sudo firewall-cmd --reload

# Verify installation
bind --version || systemctl status named

# Using Homebrew
brew install bind

# Start service
brew services start bind

# Verify installation
bind --version

# Using pkg
pkg install bind

# Enable in rc.conf
echo 'named_enable="YES"' >> /etc/rc.conf

# Start service
service named start

# Verify installation
bind --version || service named status

# Using Chocolatey
choco install bind

# Or using Scoop
scoop install bind

# Verify installation
bind --version

# Create configuration directory if needed
sudo mkdir -p /etc/bind

# Set up basic configuration
sudo tee /etc/bind/bind.conf << 'EOF'
# BIND Configuration
# Basic DNS tuning
options {
    directory "/var/cache/bind";
    recursion yes;
    allow-query { any; };
    forwarders {
        8.8.8.8;
        8.8.4.4;
    };
};
EOF

# Test configuration
sudo bind -t || sudo named configtest

# Reload service
sudo systemctl reload named

# Set appropriate permissions
sudo chown -R bind:bind /etc/bind
sudo chmod 750 /etc/bind

# Enable security features
# See security section for detailed hardening steps

# Enable service
sudo systemctl enable named

# Start service
sudo systemctl start named

# Stop service
sudo systemctl stop named

# Restart service
sudo systemctl restart named

# Reload configuration
sudo systemctl reload named

# Check status
sudo systemctl status named

# View logs
sudo journalctl -u named -f

# Enable service
rc-update add named default

# Start service
rc-service named start

# Stop service
rc-service named stop

# Restart service
rc-service named restart

# Check status
rc-service named status

# Enable in /etc/rc.conf
echo 'named_enable="YES"' >> /etc/rc.conf

# Start service
service named start

# Stop service
service named stop

# Restart service
service named restart

# Check status
service named status

# Using Homebrew services
brew services start bind
brew services stop bind
brew services restart bind

# Check status
brew services list | grep bind

# Start service
net start named

# Stop service
net stop named

# Using PowerShell
Start-Service named
Stop-Service named
Restart-Service named

# Check status
Get-Service named

# Configure performance settings
cat >> /etc/bind/bind.conf << 'EOF'
# Basic DNS tuning
options {
    directory "/var/cache/bind";
    recursion yes;
    allow-query { any; };
    forwarders {
        8.8.8.8;
        8.8.4.4;
    };
};
EOF

# Apply system tuning
sudo sysctl -w net.core.somaxconn=65535
sudo sysctl -w net.ipv4.tcp_max_syn_backlog=65535

# Restart service
sudo systemctl restart named

# Configure clustering (if supported)
# See official documentation for cluster setup

# Basic load balancing setup example
# Configure multiple instances on different ports

upstream bind_backend {
    server 127.0.0.1:53;
    server 127.0.0.1:{default_port}1 backup;
}

server {
    listen 80;
    server_name bind.example.com;
    return 301 https://$server_name$request_uri;
}

server {
    listen 443 ssl http2;
    server_name bind.example.com;

    ssl_certificate /etc/ssl/certs/bind.example.com.crt;
    ssl_certificate_key /etc/ssl/private/bind.example.com.key;

    location / {
        proxy_pass http://bind_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # WebSocket support (if needed)
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

<VirtualHost *:80>
    ServerName bind.example.com
    Redirect permanent / https://bind.example.com/
</VirtualHost>

<VirtualHost *:443>
    ServerName bind.example.com
    
    SSLEngine on
    SSLCertificateFile /etc/ssl/certs/bind.example.com.crt
    SSLCertificateKeyFile /etc/ssl/private/bind.example.com.key
    
    ProxyRequests Off
    ProxyPreserveHost On
    
    ProxyPass / http://127.0.0.1:53/
    ProxyPassReverse / http://127.0.0.1:53/
    
    # WebSocket support (if needed)
    RewriteEngine on
    RewriteCond %{HTTP:Upgrade} websocket [NC]
    RewriteCond %{HTTP:Connection} upgrade [NC]
    RewriteRule ^/?(.*) "ws://127.0.0.1:53/$1" [P,L]
</VirtualHost>

frontend bind_frontend
    bind *:80
    bind *:443 ssl crt /etc/ssl/certs/bind.pem
    redirect scheme https if !{ ssl_fc }
    default_backend bind_backend

backend bind_backend
    balance roundrobin
    option httpchk GET /health
    server bind1 127.0.0.1:53 check
    server bind2 127.0.0.1:{default_port}1 check backup

# Set appropriate permissions
sudo chown -R bind:bind /etc/bind
sudo chmod 750 /etc/bind

# Configure firewall
sudo firewall-cmd --permanent --add-service=bind
sudo firewall-cmd --reload

# Enable SELinux policies (if applicable)
sudo setsebool -P httpd_can_network_connect on

# Configure fail2ban
sudo tee /etc/fail2ban/jail.d/bind.conf << 'EOF'
[bind]
enabled = true
port = 53
filter = bind
logpath = /var/log/named/*.log
maxretry = 5
bantime = 3600
EOF

# Generate SSL certificates
sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
    -keyout /etc/ssl/private/bind.key \
    -out /etc/ssl/certs/bind.crt

# Configure SSL in bind
# See official documentation for SSL configuration

# Create database and user
sudo -u postgres psql << EOF
CREATE DATABASE bind_db;
CREATE USER bind_user WITH ENCRYPTED PASSWORD 'secure_password';
GRANT ALL PRIVILEGES ON DATABASE bind_db TO bind_user;
EOF

# Configure bind to use PostgreSQL
# See official documentation for database configuration

# Create database and user
sudo mysql << EOF
CREATE DATABASE bind_db;
CREATE USER 'bind_user'@'localhost' IDENTIFIED BY 'secure_password';
GRANT ALL PRIVILEGES ON bind_db.* TO 'bind_user'@'localhost';
FLUSH PRIVILEGES;
EOF

# Kernel parameters
sudo tee -a /etc/sysctl.conf << EOF
net.core.somaxconn = 65535
net.ipv4.tcp_max_syn_backlog = 65535
net.ipv4.ip_local_port_range = 1024 65535
net.core.netdev_max_backlog = 5000
vm.swappiness = 10
EOF

sudo sysctl -p

# BIND specific tuning
# Basic DNS tuning
options {
    directory "/var/cache/bind";
    recursion yes;
    allow-query { any; };
    forwarders {
        8.8.8.8;
        8.8.4.4;
    };
};

# Configure system limits
sudo tee -a /etc/security/limits.conf << EOF
bind soft nofile 65535
bind hard nofile 65535
bind soft nproc 32768
bind hard nproc 32768
EOF

# prometheus.yml configuration
scrape_configs:
  - job_name: 'bind'
    static_configs:
      - targets: ['localhost:53']
    metrics_path: '/metrics'

# Basic health check script
#!/bin/bash
if systemctl is-active --quiet named; then
    echo "BIND is running"
    exit 0
else
    echo "BIND is not running"
    exit 1
fi

# Configure log rotation
sudo tee /etc/logrotate.d/bind << 'EOF'
/var/log/named/*.log {
    daily
    rotate 14
    compress
    delaycompress
    missingok
    notifempty
    create 0640 bind bind
    postrotate
        systemctl reload named > /dev/null 2>&1 || true
    endscript
}
EOF

#!/bin/bash
# BIND backup script
BACKUP_DIR="/backup/bind"
DATE=$(date +%Y%m%d_%H%M%S)

mkdir -p "$BACKUP_DIR"

# Stop service (if required)
systemctl stop named

# Backup configuration
tar -czf "$BACKUP_DIR/bind-config-$DATE.tar.gz" /etc/bind

# Backup data (adjust paths as needed)
tar -czf "$BACKUP_DIR/bind-data-$DATE.tar.gz" /var/lib/bind

# Start service
systemctl start named

# Clean old backups (keep 30 days)
find "$BACKUP_DIR" -name "*.tar.gz" -mtime +30 -delete

echo "Backup completed: $BACKUP_DIR"

# Stop service
sudo systemctl stop named

# Restore configuration
sudo tar -xzf /backup/bind/bind-config-*.tar.gz -C /

# Restore data
sudo tar -xzf /backup/bind/bind-data-*.tar.gz -C /

# Set permissions
sudo chown -R bind:bind /etc/bind
sudo chown -R bind:bind /var/lib/bind

# Start service
sudo systemctl start named

# Check logs
sudo journalctl -u named -n 100
sudo tail -f /var/log/named/*.log

# Check configuration
sudo bind -t || sudo named configtest

# Check permissions
ls -la /etc/bind
ls -la /var/lib/bind

# Check if service is listening
sudo ss -tlnp | grep 53
sudo netstat -tlnp | grep 53

# Check firewall
sudo firewall-cmd --list-all
sudo iptables -L -n

# Test connection
telnet localhost 53
nc -zv localhost 53

# Check resource usage
top -p $(pgrep named)
htop -p $(pgrep named)

# Check connections
ss -ant | grep :53 | wc -l

# Monitor I/O
iotop -p $(pgrep named)

# Run in debug mode
sudo bind -d
# or
sudo named debug

# Increase log verbosity
# Edit configuration to enable debug logging

version: '3.8'
services:
  bind:
    image: bind:latest
    container_name: bind
    ports:
      - "53:53"
    volumes:
      - ./config:/etc/bind
      - ./data:/var/lib/bind
    environment:
      - bind_CONFIG=/etc/bind/bind.conf
    restart: unless-stopped
    networks:
      - bind_net

networks:
  bind_net:
    driver: bridge

apiVersion: apps/v1
kind: Deployment
metadata:
  name: bind
spec:
  replicas: 3
  selector:
    matchLabels:
      app: bind
  template:
    metadata:
      labels:
        app: bind
    spec:
      containers:
      - name: bind
        image: bind:latest
        ports:
        - containerPort: 53
        volumeMounts:
        - name: config
          mountPath: /etc/bind
      volumes:
      - name: config
        configMap:
          name: bind-config
---
apiVersion: v1
kind: Service
metadata:
  name: bind
spec:
  selector:
    app: bind
  ports:
  - port: 53
    targetPort: 53
  type: LoadBalancer

---
- name: Install and configure BIND
  hosts: all
  become: yes
  tasks:
    - name: Install bind
      package:
        name: bind
        state: present
    
    - name: Configure bind
      template:
        src: bind.conf.j2
        dest: /etc/bind/bind.conf
        owner: bind
        group: bind
        mode: '0640'
      notify: restart bind
    
    - name: Start and enable bind
      systemd:
        name: named
        state: started
        enabled: yes
  
  handlers:
    - name: restart bind
      systemd:
        name: named
        state: restarted

# RHEL/CentOS/Rocky/AlmaLinux
sudo dnf update bind

# Debian/Ubuntu
sudo apt update && sudo apt upgrade bind

# Arch Linux
sudo pacman -Syu bind

# Alpine Linux
apk update && apk upgrade bind

# openSUSE
sudo zypper update bind

# FreeBSD
pkg update && pkg upgrade bind

# Always backup before updates
tar -czf /backup/bind-pre-update-$(date +%Y%m%d).tar.gz /etc/bind

# Restart after updates
sudo systemctl restart named

# Clean logs
find /var/log/named -name "*.log" -mtime +30 -delete

# Verify integrity
sudo bind --verify || sudo named check

# Update databases (if applicable)
sudo bind-update-db

# Optimize performance
sudo bind-optimize

# Check for security updates
sudo bind --security-check