Why is Route 53 So called ?
TCP/UDP protocol have a default port 53 for DNS Queries
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Domain Registrar
DNS
Health Monitoring
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Networking & Content Delivery -> Route 53
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Register a Domain Name ?
Root Level Domain -> .com, .org, .edu. .net
Geographic Level Domain -> .co.in, .co.in
Domain Registrar -> Domain Name Purchased from
GoDaddy is an example.
"Route 53" is also a Domain Registrar
Top Level Domain - Root Name Server
"Route 53" is Name Server
Domain Registrar knows which same Set of "Name Servers" your domain points to
Remove current NS and Update NS. It takes max 24 hours before these changes are effective
Who operates them? ROOT NAME Servers
The root servers are operated by 12 different organizations:
- A VeriSign Global Registry Services
- B University of Southern California, Information Sciences Institute
- C Cogent Communications
- D University of Maryland
- E NASA Ames Research Center
- F Internet Systems Consortium, Inc.
- G US DoD Network Information Center
- H US Army Research Lab
- I Netnod
- J VeriSign Global Registry Services
- K RIPE NCC
- L ICANN
- M WIDE Project
Many of these organizations have been operating root servers since the creation of the DNS. The list shows the Internet’s early roots as a US-based research and military network.
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Route 53 Has Hosted Zone
If You have external Domain Registrar(Go Daddy) - You need a create a Hosted Zone
You need to configure - AWS Provided Name Server in External Registrar Website.
If you have Route 53 as Domain Registrar, Hosted Zone is created by default
AWS Route 53 can have 500 Hosted Zones by default and 10,000 Record Resource Sets
Connect Domain Name with Route 53 Hosted Zone - This is called Delegation
If You migrate Domain across Registrar, it usually takes around 48 Hours because DNS Systems cache it for 48 Hours
AWS Supports 2 Types of Domains - Generic TLD(.com, .net/Geographic TLD
If AWS does not contains that domain, You cannot transfer then it to AWS
You need Authorization Code from Existing Domain Registrar
Start of Authority, Hosted Zone
Route 53 - "Hosted Zone" - is a collection of records for Specific domain
Hosted Zone is a container which holds information about how you want to route traffic for domain and its sub domains.
www.techguftgu.com - Subdomains of techguftgu.com
info.techguftgu.com - techguftgu.com
support.techguftgu.com - techguftgu.com
Public Hosted Zone
Private Hosted Zone - Only works within VPC
When You create new Hosted Zone, It creates "Name Server" Record
and "Start of Authority" Record
SOA - Start of Authority
4 NameServers - Unique in 1 Hosted Zone
Do Not Change Name Servers Record
.com - Generic TLD
.net - Generic TLD
.org - Generic TLD
.in/.uk - Geographical
Unique Set of 4 TLD Name servers collectively known as - "Delegation Set"
"Route 53" - Acts as "Authoritative Servers"
ns-1234.awsdns-39.com - Example of
ns-3678.awsdns-12.org
ns-2947.awsdns-39.net
Its possible to have Hosted Zone having same Names
But they will have different Records/Different Name Servers
When You register, name Servers will be updated with "External Domain Registrar"
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nslookup
Put above command name in cmd prompt
Enter IP , Get FQDN
Enter FQDN, Get IP address
mail.google.com
docs.aws.amazon.com
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Some Registrar allow you to specify IP Adress
Some Registrar allow you to specify FQDN - Fully Qualified Domain Name
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You can Transfer Domain from 1 AWS Account to Another
For this drop a mail to Support Team @ AWS
You cannot Transfer "Hosted Zone" from 1 AWS Account to another
You can have Domain in 1 AWS Account and Hosted Zone in another Aws Account
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Types of Records in "Hosted Zone"
- A Record -> Domain Name to IPv4 Address -> 32 Bits
- AAAA Record -> DNS Name to IPv6 Address -> 128 Bits -> Quad Ipv4
- C Record -> Canonical Name - Alias of Domain
- NS Record -> NameServer Record -> 4 Nameserver for 4 TLD Domains - ORG, NET, COM, Geographical (.in, .uk) (Authoritative Name Server)
- SOA Record -> Start of Authority - Meta Info about DNS Hosted Zone
- MX Record -> Mail Server Record
NS Record - > 4 Nameservers which we need to update in - Domain Registrar
4 Name Server for each of Top level domains
CName - Cannot be made for "Root Domain" - Zone Apex
techguftgu.com ---- CNAME X
techguftgu.com ---- subdomain.techguftgu.com ---> CNAME - Yes
SOA Record -> "Hosted Zone" can have only 1 SOA Record
Email from domain of Owner
Authoritative Server
Name of Owner
Serial Number - No of Times You have incremented
