Dynamic DNS Updater
This script is meant to be added to cron if you are using afraid.org as your dynamic DNS provider. Similar may be possible with sites such as dyn.org or noip.com but are currently not supported in this project. Links to some of these product's self-built solutions can be found below.
Afraid.org Version 2 Instructions
-
Install this project.
git clone https://git.hyperling.com/me/env-docker $PROJECT_DIR -
Add your user key to
$PROJECT_DIR/Config/DynamicDNS/private.key. The key can be found on this page after signing in. -
Add this line to the system's cron scheduling using a command like
crontab -e. The sleep waits anywhere from 0 to 55 minutes due to the Random/10.@hourly bash -c 'sleep $(( $RANDOM / 10 )); $PROJECT_DIR/Config/DynamicDNS/update_dns.sh'
TESTING
Please ensure all testing is done with the test or dry run flags. If you run this for your private key outside of your network then your Dynamic DNS may become inaccurate. This program is only intended to be run in a production manner on the network which needs the Dynamic DNS pointing towards it.
Example
$ ./update_dns.sh -4
Updated DOMAIN from 1:2:3:4:5:6:7:8 to 1.2.3.4
HTTP200
Status 0 is acceptable.
$ ./update_dns.sh -6
Updated DOMAIN from 1.2.3.4 to 1:2:3:4:5:6:7:8
HTTP200
Status 0 is acceptable.
Afraid.org Version 1 Instructions
Add one of these to your crontab. Basically what the script does without fancy options and checks. Please be concious of how often you knock on the servers, and preferably add a 30-45 second sleep so that you do not hit near :00 seconds.
*/4 * * * * sleep 28; curl http://freedns.afraid.org/dynamic/update.php?YOUR_V1_KEY_GOES_HERE
*/7 * * * * sleep 42; wget -O http://freedns.afraid.org/dynamic/update.php?YOUR_V1_KEY_GOES_HERE
Other Dynamic DNS Hosts
No-IP.org Instructions
Please see the official guide on installing the Dynamic Update Client (DUC).