# sdseasydyn `sdseasydyn` is a small, CLI-first Dynamic DNS updater for the [EasyDNS](https://www.easydns.com/) service. It is designed to be safe for cron usage, avoid unnecessary updates, and behave predictably under transient network conditions. The project is implemented in modern Perl and is distributed on CPAN as `App::sdseasydyn`. --- ## Features - Simple CLI interface (`sdseasydyn update`) - Clear configuration precedence: CLI > environment > config file > defaults - Secure handling of credentials (tokens are never logged) - Public IPv4 discovery with configurable endpoint - Local state file to avoid redundant updates - Bounded retry logic using `Retry::Policy` - Suitable for unattended / scheduled execution --- ## Quick start sdseasydyn update --host example.easydns.net Credentials are provided via environment variables: export EASYDNS_USER=your_username export EASYDNS_TOKEN=your_token See `docs/EASYDNS.md` and `docs/HOWTO.md` for full configuration details. --- ## Relationship to EasyDNS This project is an independent, community-maintained tool and is not affiliated with, endorsed by, or officially supported by EasyDNS Technologies. It uses the publicly documented EasyDNS Dynamic DNS update endpoint and is provided as-is under the terms of its open-source license. --- ## Documentation - `docs/EASYDNS.md` — EasyDNS-specific behavior and notes - `docs/HOWTO.md` — usage and configuration guide - `SECURITY.md` — security considerations --- ## License This project is licensed under the GNU Lesser General Public License version 2.1 (LGPL-2.1). See the `LICENSE` file for details. --- ## Author Sergio de Sousa