Domain¶

Buying a domain¶

free
- https://my.freenom.com
  - tested, muy bueno
Google Domain

Changing nameserver¶

Assuming your domain is Google domain and you want to use Cloudfare's nameserver

Add your domain in Cloudfare
Make sure the DNS records are correct
Go to your domain in Google domain
Disable DNSSEC and wait for a few days until it's truly disabled
Change the nameservers following Cloudfare's prompt
- See Change your nameservers
- May need to go to your site hosts and reconfigure their custom domains
Unlock domain in "Registration settings
Go to Cloudfare
Enable DNSSEC

Transferring a domain to another registrar¶

Google -> Cloudfare in this example

See Transfer your domain to Cloudflare

Follow the steps in #Changing nameserver
Wait for a few hours until it allows you to transfer

Checking domain information¶

All info¶

dig www.example.com

Some web tools

Propagation¶

See the propagation status of your A, CNAME, TXT, MX, etc. records

https://www.whatsmydns.net/

Note that if you're using Cloudfare's DNS and has proxy enabled in your CNAME records, they're actually A records pointing to Cloudfare's proxy server IP under the hood, so no CNAME records published and it will be all red on the web tool.

Related threads

Only DNS info¶

dig www.example.com +nostats +nocomments +nocmd

Nameserver info¶

dig example.com NS +short

Note that it will not return anything if you dig <subdomain>.<domain>.

Check TXT record¶

dig www.example.com TXT

DNS¶

Set up DNS record¶

for ip
- add a record -> Type = A, Target = <your target ip>
- Name = whatever, it's your subdomain name
  e.g. Name = www -> www.<domain name> points to Target
  - can leave it blank
- e.g.

It may need a couple of hours to fully take effect, and you may see some weird erros in the process, so please be patient. (took about 3 hours for my Google domain to fully work)

Some common errors before it fully takes effect

can dig & open in Chrome but not ping or open in FIrefox

Setting up a custom domain in Github Page¶

Follow the documentation to set up custom domain to your github page. Here's the high level steps:

Make sure you own the domain
Go to Github account settings and verify the domain
Go to your repo and add the your custom domain xxx.domain
Go to your DNS settings and add a CNAME record pointing xxx.domain to xxx.github.io
Wait and be patient

Note that after you add the custom domain for xxx.github.io, xxx.github.io/repo will also be redirected to xxx.domain/repo.

Set different subdomains for different repo

Follow the same steps, and point everything to xxx.github.io instead of xxx.github.io/repo

Here's mine

Reference