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infrastructure/networking/dns-management/SKILL.md

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+---
+name: dns-management
+description: Configure DNS zones and records. Manage Route53, Cloud DNS, and self-hosted DNS. Use when setting up DNS infrastructure.
+license: MIT
+metadata:
+  author: devops-skills
+  version: "1.0"
+---
+
+# DNS Management
+
+Configure and manage DNS infrastructure.
+
+## AWS Route 53
+
+```bash
+# Create hosted zone
+aws route53 create-hosted-zone --name example.com --caller-reference $(date +%s)
+
+# Create record
+aws route53 change-resource-record-sets --hosted-zone-id ZXXXXX --change-batch '{
+  "Changes": [{
+    "Action": "CREATE",
+    "ResourceRecordSet": {
+      "Name": "www.example.com",
+      "Type": "A",
+      "TTL": 300,
+      "ResourceRecords": [{"Value": "1.2.3.4"}]
+    }
+  }]
+}'
+```
+
+## BIND Configuration
+
+```bash
+# /etc/bind/zones/example.com.db
+$TTL 86400
+@   IN  SOA ns1.example.com. admin.example.com. (
+        2024010101 ; Serial
+        3600       ; Refresh
+        1800       ; Retry
+        604800     ; Expire
+        86400 )    ; Minimum TTL
+
+    IN  NS      ns1.example.com.
+    IN  A       1.2.3.4
+www IN  A       1.2.3.4
+```
+
+## Common Records
+
+```
+A     - IPv4 address
+AAAA  - IPv6 address
+CNAME - Alias to another domain
+MX    - Mail server
+TXT   - Text record (SPF, DKIM)
+NS    - Name server
+```
+
+## Best Practices
+
+- Low TTL during migrations
+- Implement DNSSEC
+- Use multiple name servers
+- Monitor DNS resolution