cloudflare-dns-operations（Cloudflare DNS 操作）

Cloudflare DNS Operations Skill

Low-level Cloudflare DNS and zone management operations using Cloudflare API for manual record management and advanced configuration.

Quick Start

Quick DNS operations:

# Load environment variables
source /home/dawiddutoit/projects/network/.env

# List all DNS records
/home/dawiddutoit/projects/network/scripts/cf-dns.sh list

# Add A record
/home/dawiddutoit/projects/network/scripts/cf-dns.sh add A api.temet.ai 192.168.68.100

# Add CNAME record
/home/dawiddutoit/projects/network/scripts/cf-dns.sh add CNAME www temet.ai

# Update existing record
/home/dawiddutoit/projects/network/scripts/cf-dns.sh update api.temet.ai 192.168.68.200

# Delete record
/home/dawiddutoit/projects/network/scripts/cf-dns.sh delete api.temet.ai

Table of Contents

1. When to Use This Skill
2. What This Skill Does
3. Instructions

- 3.1 Setup API Authentication - 3.2 List DNS Records - 3.3 Add DNS Records - 3.4 Update DNS Records - 3.5 Delete DNS Records - 3.6 Manage Zone Settings - 3.7 Dynamic DNS Updates

1. Supporting Files
2. Expected Outcomes
3. Requirements
4. Red Flags to Avoid

When to Use This Skill

Explicit Triggers:

• "Add DNS record"
• "Update DNS record"
• "Delete DNS record"
• "Dynamic DNS"
• "Cloudflare API operations"
• "Manual DNS management"

Implicit Triggers:

• Need to add DNS record outside domain management system
• Dynamic home IP updates needed
• Testing DNS configurations
• Bulk DNS operations required
• Zone settings need manual adjustment

Debugging Triggers:

• "How do I add a DNS record?"
• "How to update my home IP?"
• "What DNS records exist?"

What This Skill Does

1. Setup Auth - Configures Cloudflare API credentials
2. Lists Records - Shows all DNS records in zone
3. Adds Records - Creates new A, AAAA, CNAME, TXT records
4. Updates Records - Modifies existing record values
5. Deletes Records - Removes DNS records
6. Manages Settings - Configures SSL, caching, security settings
7. Dynamic DNS - Automates home IP updates

Instructions

3.1 Setup API Authentication

Required credentials:

• Cloudflare email address
• Cloudflare API token or Global API Key
• Zone ID for temet.ai domain

Step 1: Get Zone ID

1. Go to: https://dash.cloudflare.com
2. Select domain: temet.ai
3. Click: Overview tab
4. Find: API section in right sidebar
5. Copy: Zone ID

Example: 1234567890abcdef1234567890abcdef

Step 2: Get API Token

Recommended: Use API Token (scoped permissions)

1. Go to: https://dash.cloudflare.com/profile/api-tokens
2. Click: Create Token
3. Select template: Edit zone DNS
4. Zone Resources: Include → Specific zone → temet.ai
5. Click: Continue to summary → Create Token
6. Copy token (shown only once)

Alternative: Use Global API Key (full account access)

1. Go to: https://dash.cloudflare.com/profile/api-tokens
2. Scroll to: API Keys section
3. Click: View next to Global API Key
4. Copy key

⚠️ Security note: API Token is more secure (scoped permissions).

Step 3: Add to.env

# Edit .env
nano /home/dawiddutoit/projects/network/.env

# Add (using API Token - recommended):
CLOUDFLARE_EMAIL="your-email@example.com"
CLOUDFLARE_ZONE_ID="your-zone-id-here"
CLOUDFLARE_API_KEY="your-api-token-here"

# Or using Global API Key:
CLOUDFLARE_EMAIL="your-email@example.com"
CLOUDFLARE_ZONE_ID="your-zone-id-here"
CLOUDFLARE_GLOBAL_API_KEY="your-global-api-key-here"

Step 4: Test Access

source /home/dawiddutoit/projects/network/.env

curl -s -X GET "https://api.cloudflare.com/client/v4/user" \
    -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
    -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
    | jq '.success'

Expected output: true

3.2 List DNS Records

Using helper script:

/home/dawiddutoit/projects/network/scripts/cf-dns.sh list

Expected output:

DNS Records for temet.ai:
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Type    Name                 Value
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
CNAME   pihole               tunnel-id.cfargotunnel.com
CNAME   jaeger               tunnel-id.cfargotunnel.com
A       home                 1.2.3.4
...

Using direct API call:

source /home/dawiddutoit/projects/network/.env

curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records" \
    -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
    -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
    | jq -r '.result[] | "\(.type)\t\(.name)\t\(.content)"'

Filter by type:

# List only A records
/home/dawiddutoit/projects/network/scripts/cf-dns.sh list | grep "^A"

# List only CNAME records
/home/dawiddutoit/projects/network/scripts/cf-dns.sh list | grep "^CNAME"

3.3 Add DNS Records

Add A record (IPv4):

/home/dawiddutoit/projects/network/scripts/cf-dns.sh add A api.temet.ai 192.168.68.100

Add AAAA record (IPv6):

/home/dawiddutoit/projects/network/scripts/cf-dns.sh add AAAA ipv6.temet.ai 2001:db8::1

Add CNAME record:

/home/dawiddutoit/projects/network/scripts/cf-dns.sh add CNAME www temet.ai

Add TXT record (verification/SPF):

/home/dawiddutoit/projects/network/scripts/cf-dns.sh add TXT _verification "verification-code"

Add record with proxy enabled (orange cloud):

# Using direct API call
source /home/dawiddutoit/projects/network/.env

curl -X POST "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records" \
    -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
    -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
    -H "Content-Type: application/json" \
    --data '{
      "type": "A",
      "name": "proxied.temet.ai",
      "content": "192.168.68.100",
      "ttl": 1,
      "proxied": true
    }' | jq '.'

Common record types:

3.4 Update DNS Records

Update existing record:

/home/dawiddutoit/projects/network/scripts/cf-dns.sh update api.temet.ai 192.168.68.200

Script automatically:

1. Finds existing record by name
2. Gets record ID
3. Updates content to new value
4. Preserves type and proxy settings

Update with direct API call:

source /home/dawiddutoit/projects/network/.env

# Step 1: Get record ID
record_id=$(curl -s -X GET \
  "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records?name=api.temet.ai" \
  -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
  -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
  | jq -r '.result[0].id')

# Step 2: Update record
curl -X PUT \
  "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records/${record_id}" \
  -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
  -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
  -H "Content-Type: application/json" \
  --data '{
    "type": "A",
    "name": "api.temet.ai",
    "content": "192.168.68.200",
    "ttl": 1,
    "proxied": false
  }' | jq '.'

3.5 Delete DNS Records

Delete record by name:

/home/dawiddutoit/projects/network/scripts/cf-dns.sh delete api.temet.ai

Confirm before deletion:

Script will show:

Found record: A api.temet.ai → 192.168.68.100
Delete this record? (y/N):

Using direct API call:

source /home/dawiddutoit/projects/network/.env

# Step 1: Get record ID
record_id=$(curl -s -X GET \
  "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records?name=api.temet.ai" \
  -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
  -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
  | jq -r '.result[0].id')

# Step 2: Delete record
curl -X DELETE \
  "https://api.cloudflare.com/client/v4/zones/${CLOUDFLARE_ZONE_ID}/dns_records/${record_id}" \
  -H "X-Auth-Email: ${CLOUDFLARE_EMAIL}" \
  -H "X-Auth-Key: ${CLOUDFLARE_API_KEY}" \
  | jq '.'

3.6 Manage Zone Settings

View all zone settings:

/home/dawiddutoit/projects/network/scripts/cf-settings.sh all

View specific setting:

# SSL/TLS mode
/home/dawiddutoit/projects/network/scripts/cf-settings.sh get ssl

# Security level
/home/dawiddutoit/projects/network/scripts/cf-settings.sh get security_level

# Caching level
/home/dawiddutoit/projects/network/scripts/cf-settings.sh get cache_level

Update setting:

# Set SSL to Full
/home/dawiddutoit/projects/network/scripts/cf-settings.sh set ssl full

# Enable always HTTPS
/home/dawiddutoit/projects/network/scripts/cf-settings.sh set always_use_https on

# Enable HTTP/3
/home/dawiddutoit/projects/network/scripts/cf-settings.sh set http3 on

Enable security suite:

# Enables: SSL Full, Always HTTPS, WAF
/home/dawiddutoit/projects/network/scripts/cf-settings.sh enable-security

Enable performance suite:

# Enables: Brotli, HTTP/2, HTTP/3
/home/dawiddutoit/projects/network/scripts/cf-settings.sh enable-performance

Purge cache:

# Purge all cached files
/home/dawiddutoit/projects/network/scripts/cf-settings.sh purge-cache

Enable development mode:

# Bypass cache for 3 hours
/home/dawiddutoit/projects/network/scripts/cf-settings.sh dev-mode on

# Disable development mode
/home/dawiddutoit/projects/network/scripts/cf-settings.sh dev-mode off

3.7 Dynamic DNS Updates

Scenario: Home internet IP changes, need to update DNS automatically.

Manual update:

# Get current public IP
current_ip=$(curl -s https://api.ipify.org)

# Update DNS record
/home/dawiddutoit/projects/network/scripts/cf-dns.sh update home.temet.ai $current_ip

Automated script:

#!/bin/bash
# /home/dawiddutoit/scripts/dynamic-dns-update.sh

source /home/dawiddutoit/projects/network/.env

# Get current public IP
current_ip=$(curl -s https://api.ipify.org)

# Get DNS record IP
dns_ip=$(dig +short home.temet.ai @1.1.1.1)

# Update if different
if [ "$current_ip" != "$dns_ip" ]; then
  echo "IP changed: $dns_ip → $current_ip"
  /home/dawiddutoit/projects/network/scripts/cf-dns.sh update home.temet.ai $current_ip
else
  echo "IP unchanged: $current_ip"
fi

Schedule with cron:

# Edit crontab
crontab -e

# Check every 5 minutes
*/5 * * * * /home/dawiddutoit/scripts/dynamic-dns-update.sh >> /var/log/dynamic-dns.log 2>&1

Notification on change:

#!/bin/bash
# With notification

current_ip=$(curl -s https://api.ipify.org)
dns_ip=$(dig +short home.temet.ai @1.1.1.1)

if [ "$current_ip" != "$dns_ip" ]; then
  /home/dawiddutoit/projects/network/scripts/cf-dns.sh update home.temet.ai $current_ip

  # Send notification (if ntfy configured)
  if [ -n "$NTFY_TOPIC" ]; then
    curl -d "Home IP updated: $current_ip" https://ntfy.sh/$NTFY_TOPIC
  fi
fi

Supporting Files

Expected Outcomes

Success:

• DNS records listed successfully
• New records added and propagate within minutes
• Existing records updated correctly
• Deleted records removed from DNS
• Zone settings applied successfully
• Dynamic DNS updates working

Partial Success:

• Records created but propagation slow (normal, wait 5-10 minutes)
• Settings applied but not effective immediately (cache may need purging)

Failure Indicators:

• Authentication failed (403 errors)
• Zone ID not found
• Record already exists (can't add duplicate)
• Record not found (can't update/delete non-existent)

Requirements

• Cloudflare account with temet.ai domain
• Cloudflare API token or Global API Key
• Zone ID for temet.ai
• curl and jq installed
• .env file with credentials
• Network access to Cloudflare API

Red Flags to Avoid

• Do not use Global API Key if API Token suffices (security best practice)
• Do not commit API credentials to git (use.env)
• Do not delete records without confirmation (irreversible)
• Do not create duplicate records (causes DNS issues)
• Do not enable proxy on internal IPs (192.168.x.x) - won't work
• Do not set TTL < 60 seconds (Cloudflare minimum for free plans)
• Do not purge cache frequently (rate limits apply)

Notes

• DNS propagation typically takes 1-5 minutes globally
• Cloudflare proxied records (orange cloud) hide real IP
• TTL of 1 means "Auto" (Cloudflare manages)
• Free plan limits: 1000 DNS records per zone
• API rate limits: 1200 requests per 5 minutes
• cf-dns.sh and cf-settings.sh scripts located in scripts/ directory
• Use API Token over Global API Key (better security with scoped permissions)
• Zone settings changes may require cache purge to take effect immediately
• Dynamic DNS useful for home servers with changing IPs
• Cloudflare DNS is authoritative after migration from GoDaddy
• Use domain management system (manage-domains.sh) for service subdomains
• Use this skill for one-off DNS operations or non-service records