Dynamic DNS with your Raspberry Pi4, Namecheap and Tailscale

Recently, I setup a Raspberry Pi 4 with Pi-hole and Tailscale so that I didn’t get bombarded with banner ads while I surfed the web. It works great, but only if I’m at the house using my Wifi. With the pandemic nearly over, and our ability to move around more, I kinda got used to not seeing ads while I checked the news or played scrabble on my phone.

One of the things I wanted to do was to be able to

1. Install perl and dependencies
2. sudo apt-get install autoconf cpanminus
3. cpan
4. install CPAN
5. reload cpan
6. install module HTTP::Daemon:SSL
7. Get the latest version of DDClient from Github
8. cd ddclient
9. ./autogen
10. ./configure –prefix=/usr –sysconfdir=/etc/ddclient –localstatedir=/var
11. make
12. make VERBOSE=1 check
13. sudo make install

vim /etc/ddclient/ddclient.conf

use=if,                     if=tailscale0
##
## NameCheap (namecheap.com)
##
protocol=namecheap,				\
server=dynamicdns.park-your-domain.com,	\
login=luther.io,			\
password=GETYOURPASSWORDFROMTHENAMECHEAPUI		\
HOSTNAME_YOU_WANT_TO_SET_IP_FOR

May 24 23:43:14 rpi ddclient[5761]: INFO:     forcing updating rpi because no cached entry exists.
May 24 23:43:14 rpi ddclient[5761]: INFO:     setting IP address to 100.114.93.47 for rpi
May 24 23:43:14 rpi ddclient[5761]: UPDATE:   updating rpi
May 24 23:43:14 rpi ddclient[5761]: CONNECT:  dynamicdns.park-your-domain.com
May 24 23:43:14 rpi ddclient[5761]: CONNECTED:  using SSL
May 24 23:43:14 rpi ddclient[5761]: SENDING:  GET /update?host=rpi&domain=luther.io&password=fe90414aee38420b8572b97d80328cf5&ip=100.114.93.47 HTTP/1.1
May 24 23:43:14 rpi ddclient[5761]: SENDING:  Host: dynamicdns.park-your-domain.com
May 24 23:43:14 rpi ddclient[5761]: SENDING:  User-Agent: ddclient/3.9.1
May 24 23:43:14 rpi ddclient[5761]: SENDING:  Connection: close
May 24 23:43:14 rpi ddclient[5761]: SENDING:
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  HTTP/1.1 200 OK#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  Cache-Control: private#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  Content-Type: text/html#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  Set-Cookie: ASPSESSIONIDSQQBACSQ=NNCEPLOBOLOPDMMFKFGCHAEN; path=/#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  Date: Tue, 25 May 2021 04:43:14 GMT#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  Connection: close#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  Content-Length: 235#015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  #015
May 24 23:43:14 rpi ddclient[5761]: RECEIVE:  <?xml version="1.0"?><interface-response><Command>SETDNSHOST</Command><Language>eng</Language><IP>100.114.93.47</IP><ErrCount>0</ErrCount><ResponseCount>0</ResponseCount><Done>true</Done><debug><![CDATA[]]></debug></interface-response>
May 24 23:43:14 rpi ddclient[5761]: SUCCESS:  updating rpi: good: IP address set to 100.114.93.47
May 24 23:43:44 rpi ddclient[5808]: SUCCESS:  rpi: skipped: IP address was already set to 100.114.93.47.