2022-01-02 21:21:20 +00:00
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Manage DNS and DoH servers from netwatch
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========================================
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[◀ Go back to main README](../README.md)
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2022-02-11 22:34:39 +00:00
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> 🛈 **Info**: This script can not be used on its own but requires the base
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> installation. See [main README](../README.md) for details.
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2022-01-02 21:21:20 +00:00
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Description
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-----------
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This script reads server state from netwatch and manages used DNS and
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DoH (DNS over HTTPS) servers.
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Requirements and installation
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-----------------------------
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Just install the script:
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$ScriptInstallUpdate netwatch-dns;
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Then add a scheduler to run it periodically:
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/ system scheduler add interval=1m name=netwatch-dns on-event="/ system script run netwatch-dns;" start-time=startup;
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Configuration
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-------------
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The DNS and DoH servers to be checked have to be added to netwatch with
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specific comment:
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/ tool netwatch add comment="doh, hostname=cloudflare-dns" host=1.1.1.1;
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/ tool netwatch add comment="dns, hostname=google-dns" host=8.8.8.8;
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/ tool netwatch add comment="doh, dns, hostname=quad-nine" host=9.9.9.10;
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This will configure *cloudflare-dns* for DoH (`https://1.1.1.1/dnsquery`), and
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*google-dns* and *quad-nine* for regular DNS (`8.8.8.8,9.9.9.10`) if up.
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If *cloudflare-dns* is down the script will fall back to *quad-nine* for DoH.
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Giving a specific query url for DoH is possible:
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/ tool netwatch add comment="doh, hostname=nextdns, doh-url=https://dns.nextdns.io/dns-query" host=199.247.16.158;
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Note that using a name in DoH url may introduce a chicken-and-egg issue!
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Sometimes using just one specific (possibly internal) DNS server may be
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desired, with fallback in case it fails. This is possible as well:
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/ tool netwatch add comment="dns, hostname=pi-hole" host=10.0.0.10;
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/ tool netwatch add comment="dns-fallback, hostname=cloudflare-dns" host=1.1.1.1;
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Tips & Tricks
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-------------
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### Use in combination with notifications
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Netwatch entries can be created to work with both - this script and
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[netwatch-notify](netwatch-notify.md). Just give options for both:
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/ tool netwatch add comment="doh, notify, hostname=cloudflare-dns" host=1.1.1.1;
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Also this allows to update host address, see option `resolve`.
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See also
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--------
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* [Notify on host up and down](netwatch-notify.md)
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---
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[◀ Go back to main README](../README.md)
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[▲ Go back to top](#top)
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