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
code
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