Raspberry Pi tip : Map your Subdomain to Pi

After I had my Raspberry Pi setup, I wanted to create a subdomain which would point to it.
This is trivial to set up if you have a static IP but I’m assuming that like me you don’t have that.

The way that I have set this up is by following this excellent post on superuser. First you need to set up a dynamic dns for your pi. I use DNSDynamic for this, a tutorial on how to set this up for your pi can be found here. With dynamic dns set up, it’s like having a static ip.

All you need to do after this is to create a CNAME record which points to your dynamic dns. This can be created using your domain registrar’s web interface. A CNAME is basically a pointer and can point to any IP or domain. In my case I set up pi.nikhilbhardwaj.in to point to my dynamic dns. If you’ve set that up correctly you can use dig to verify this. Here’s what I get, babypi.ssh22.net is my dynamic dns. I’d advice you to choose a better name!

After this it’s a matter of forwarding the right ports on your home router and viola you have a subdomain that points to your pi!

dig pi.nikhilbhardwaj.in

; <<>> DiG 9.8.3-P1 <<>> pi.nikhilbhardwaj.in
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57260
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 4

;pi.nikhilbhardwaj.in.      IN  A

pi.nikhilbhardwaj.in.   13171   IN  CNAME   babypi.ssh22.net.
babypi.ssh22.net.   60  IN  A