69 lines
2.1 KiB
Markdown
69 lines
2.1 KiB
Markdown
# Dynamic DNS Updater
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This script is meant to be added to cron if you are using afraid.org as your
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dynamic DNS provider. Similar may be possible with sites such as dyn.org or
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noip.com but are currently not supported in this project. Links to some of these
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product's self-built solutions can be found below.
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## Afraid.org Version 2 Instructions
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1. Install this project.
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```
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git clone https://git.hyperling.com/me/env-docker $PROJECT_DIR
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```
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1. Add your user key to `$PROJECT_DIR/Config/DynamicDNS/private.key`. The key can
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be found on [this page](https://freedns.afraid.org/dynamic/v2/) after signing in.
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1. Add this line to the system's cron scheduling using a command like `crontab -e`.
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The sleep waits anywhere from 0 to 55 minutes due to the
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[Random/10](https://tldp.org/LDP/abs/html/randomvar.html).
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```
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@hourly bash -c 'sleep $(( $RANDOM / 10 )); $PROJECT_DIR/Config/DynamicDNS/update_dns.sh'
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```
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### TESTING
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Please ensure all testing is done with the test or dry run flags. If you run
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this for your private key outside of your network then your Dynamic DNS may
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become inaccurate. This program is only intended to be run in a production
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manner on the network which needs the Dynamic DNS pointing towards it.
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### Example
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```
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$ ./update_dns.sh -4
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Updated DOMAIN from 1:2:3:4:5:6:7:8 to 1.2.3.4
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HTTP200
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Status 0 is acceptable.
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```
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```
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$ ./update_dns.sh -6
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Updated DOMAIN from 1.2.3.4 to 1:2:3:4:5:6:7:8
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HTTP200
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Status 0 is acceptable.
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```
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## Afraid.org Version 1 Instructions
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Add one of these to your crontab. Basically what the script does without fancy
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options and checks. Please be concious of how often you knock on the servers,
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and preferably add a 30-45 second sleep so that you do not hit near :00 seconds.
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```
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*/4 * * * * sleep 28; curl http://freedns.afraid.org/dynamic/update.php?YOUR_V1_KEY_GOES_HERE
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```
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```
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*/7 * * * * sleep 42; wget -O http://freedns.afraid.org/dynamic/update.php?YOUR_V1_KEY_GOES_HERE
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```
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## Other Dynamic DNS Hosts
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### No-IP.org Instructions
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Please see the official guide on installing the Dynamic Update Client (DUC).
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https://my.noip.com/dynamic-dns/duc
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