-
-
Save cyrusboadway/5a7b715665f33c237996 to your computer and use it in GitHub Desktop.
| #!/bin/bash | |
| ### Google Domains provides an API to update a DNS "Syntheitc record". This script | |
| ### updates a record with the script-runner's public IP, as resolved using a DNS | |
| ### lookup. | |
| ### | |
| ### Google Dynamic DNS: https://support.google.com/domains/answer/6147083 | |
| ### Synthetic Records: https://support.google.com/domains/answer/6069273 | |
| USERNAME="" | |
| PASSWORD="" | |
| HOSTNAME="yoursubdomain.yourdomain.here" | |
| # Resolve current public IP | |
| IP=$( dig +short myip.opendns.com @resolver1.opendns.com ) | |
| # Update Google DNS Record | |
| URL="https://${USERNAME}:${PASSWORD}@domains.google.com/nic/update?hostname=${HOSTNAME}&myip=${IP}" | |
| curl -s $URL |
I did something similar with python, avoiding calls from google domains. Today I have the script running every 5 minutes.
I'm getting badagent when trying to run in macosx terminal
Nevermind fixed it. Changed to use Google domains to get IP
only posting here because i was drawn in by the search engine... never transmit your username and password in anything but TLS and proper TLS... dont be a fool its not worth it in the end.
you can use this for ip address retrieval
currentipaddress="$(wget -q -O - checkip.dyndns.org | sed -e 's/.Current IP Address: //' -e 's/<.$//')"
or you can use this if you are directly connected... change to your correct network interface though
currentipaddress="$(ifconfig eth1 | grep -o "inet addr:([0-9]{1,3}.){3}[0-9]{1,3}" | sed 's/inet addr://')"
and this is the curl request that i have formed and it works perfectly everytime.
curloutput=$(curl -s --data-urlencode "hostname=@.domain.com" --data-urlencode "myip=$currentipaddress" -H "Host: domains.google.com" -u "$username:$password" "https://domains.google.com/nic/update")
echo "$curloutput" to wherever you want
I know this is an old thread but you can just send a request to the URL and not include the IP just pass the username and password.
The API will then use the IP the request was sent from.
e.g.
curl https://username:password@domains.google.com/nic/update?hostname=subdomain.yourdomain.com
For more details see the section at the bottom of this page labelled "Using the API to update your Dynamic DNS record"
https://support.google.com/domains/answer/6147083?hl=en-GB
I had to change line 15 to IP=$( curl ifconfig.me ). Other than that the script works.
A stare is born
I think it would be slightly more secure to do this so your username and password are not in plain text (url) provided you're making an HTTPS request:
curl --user ${USERNAME}:${PASSWORD} -s $URL