My DNS Tools

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Web Tools

1 Toolbox | DNSstuff

2 Whois Lookup

3 Dig web interface

4 Global DNS Propagation Checker - What's My DNS?

5 intoDNS: Check DNS server and mail server health

6 Google Apps Toolbox

7 Website IP Address

8 Redirect Checker

9 SPF Query Tool

A1 DNSSEC Test - ViewDNS.info

A2 Flush Cache - Public DNS — Google Developers

A3 SPF Checker

A4 Ip Ranger checker CIDR

A5 DKIM Test

A6 Puny Code Converter

A7 Verisign IDN Conversion Tool

A8 SPF Checker -Email

A9 Email Address Verifier

A10 Trace Email

A11 Online Calculator

A12 Reverse lookup

A13 List of Internet top-level domains

A14 Internic Domain/Registar/NS lookup

A15 Chrome App Http Headers

A16 Google Cloud DNS

A17 DIG Command Line Tool

A18 Setup PTR for block of IP

A19 Using Dig Commands

Registry Premium vs Regular TLD
Reading a DNS and Whois Record

Resource Records
NS
Glue Records
SRV

TTL (Time to Live)

The TTL is not configured locally in the caching server but is set in the authoritative server and passed along with the information itself. This way the administrator of a domain, can control how long it takes for any change to be known throughout the Internet. By carefully choosing values, one can set the trade off between being able to change things rapidly on the one hand and minimising computing and networking resources needed by name servers on the other hand. If particular information is not expected to change in the near future one can have a high TTL and information known to change soon can be transmitted with a low TTL. It is standard practice to reduce the TTL transmitted with information that is scheduled to change in order to make that change visible rapidly throughout the Internet; once the change has happened the TTL is increased again.

Glossary

ARPA	Address and Routing Parameter Area.
DDNS	Dynamic DNS
DKIM	DomainKeys Identified Mail
DNSSEC	Domain Name System Security Extensions
IANA	Internet Assigned Numbers Authority
ICANN	Internet Corporation for Assigned Names and Numbers
InterNIC	Internet Network Information Center
PTR	Pointer record
SOA	Start of Authority
SPF	Sender Policy Framework
URL	Uniform Resource Locator

ICANN

IANA

INTERNIC

EPP Status Codes

302 vs 301 redirect

Pagespeed Setup

Webmaster Tools

How To Setup Your Google Apps Domain

Integrate with Blogger

Blogger integration

Integrate With Google Sites

Email Forwarding

Subdomain forward

Forwards subdomain to a target URL

301 VS 302

For 301 redirect, If users change the forwarding records, it will need a longer time to be updated because of browser’s cache.

*216.239.32.21 is a machine in the Google data center that matches website requests against a database of all the websites Google hosts.

If a match is found, then 216.239.32.21 redirects the user to the correct website.

website data is not stored on a single machine with an address, but is virtually stored in Google's network of data centers across the globe. This is the reason you cannot look it up with an ip address.

302 Moved Temporarily

-A 302 redirect is a temporary redirect.

-A 302 Moved Temporarily is cached depending on whether or not it contains a Cache-Control or Expires header.

If neither of these headers is present in the response, the 302 is treated as uncacheable.

For 301 redirect, If users change the forwarding records, it will need a longer time to be updated because of browser’s cache.

Circular Dependency

For example, if the authoritative name server for example.org is ns1.example.org, a computer trying to resolve www.example.org first resolves ns1.example.org. Since ns1 is contained in example.org, this requires resolving example.org first, which presents a circular dependency.

To break the dependency, the nameserver for the org top level domain includes glue along with the delegation for example.org. The glue records are address records that provide IP addresses for ns1.example.org. The resolver uses one or more of these IP addresses to query one of domain's authoritative servers, which allows it to complete the DNS query.

Domain Life Cycle

DNS Resolution Process

Zone File

DNSSEC

DNS Cache Poisoning

DDNS

Manual API Update DDNS

https://domains.google.com/nic/update

Example request:

https://username:password@domains.google.com/nic/update?hostname=subdomain.yourdomain.com&myip=1.2.3.4

Cloud Computing

Cloud computing involves deploying groups of remote servers and software networks that allow centralized data storage and online access to computer services or resources.

Google Cloud DNS is a high-performance, resilient, global DNS service that provides a cost-effective way to make your applications and services available to your users. This programmable, authoritative DNS service can be used to easily publish and manage DNS records using the same infrastructure relied upon by Google.

Google Cloud DNS lets you publish your zones and records in the DNS without the burden of managing your own DNS servers and software. You use the gcloud tool or the REST API directly to work with Cloud DNS.