mirror of
https://github.com/eworm-de/routeros-scripts
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94 lines
4 KiB
Markdown
94 lines
4 KiB
Markdown
Create DNS records for DHCP leases
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==================================
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[](https://github.com/eworm-de/routeros-scripts/stargazers)
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[](https://github.com/eworm-de/routeros-scripts/network)
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[](https://github.com/eworm-de/routeros-scripts/watchers)
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[](https://mikrotik.com/download/changelogs/)
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[](https://t.me/routeros_scripts)
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[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A4ZXBD6YS2W8J)
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[⬅️ Go back to main README](../README.md)
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> ℹ️ **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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Description
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-----------
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This script adds (and updates & removes) dns records based on dhcp server
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leases. An A record based on mac address is created for all bound lease,
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additionally a CNAME record is created from host name if available.
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Requirements and installation
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-----------------------------
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Just install the script:
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$ScriptInstallUpdate dhcp-to-dns;
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Then run it from dhcp server as lease script. You may want to use
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[lease-script](lease-script.md).
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A scheduler cares about cleanup:
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/system/scheduler/add interval=15m name=dhcp-to-dns on-event="/system/script/run dhcp-to-dns;" start-time=startup;
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Configuration
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-------------
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On first run a disabled static dns record acting as marker (with comment
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"`--- dhcp-to-dns above ---`") is added. Move this entry to define where new
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entries are to be added.
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The configuration goes to dhcp server's network definition. The domain is
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used to form the dns name:
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/ip/dhcp-server/network/add address=10.0.0.0/24 domain=example.com;
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A bound lease for mac address `00:11:22:33:44:55` with ip address
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`10.0.0.50` would result in an A record `00-11-22-33-44-55.example.com`
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pointing to the given ip address.
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Additional options can be given from comment, to add an extra level in
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dns name or define a different domain.
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/ip/dhcp-server/network/add address=10.0.0.0/24 domain=example.com comment="domain=another-domain.com, name-extra=dhcp";
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This example would result in name `00-11-22-33-44-55.dhcp.another-domain.com`
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for the same lease.
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If no domain is found in dhcp server's network definition a fallback from
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`global-config-overlay` is used. This is the parameter:
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* `Domain`: the domain used for dns records
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> ℹ️ **Info**: Copy relevant configuration from
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> [`global-config`](../global-config.rsc) (the one without `-overlay`) to
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> your local `global-config-overlay` and modify it to your specific needs.
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### Host name from DHCP lease comment
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Overwriting the host name from dhcp lease comment is supported, just add
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something like `hostname=new-hostname` in comment, and separate it by comma
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from other information if required:
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/ip/dhcp-server/lease/add address=10.0.0.50 comment="my device, hostname=new-hostname" mac-address=00:11:22:33:44:55 server=dhcp;
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Note this information can be configured in wireless access list with
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[dhcp-lease-comment](dhcp-lease-comment.md), though it comes with a delay
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then due to script execution order. Decrease the scheduler interval to
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reduce the effect.
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See also
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--------
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* [Collect MAC addresses in wireless access list](collect-wireless-mac.md)
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* [Comment DHCP leases with info from access list](dhcp-lease-comment.md)
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* [Create DNS records for IPSec peers](ipsec-to-dns.md)
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* [Run other scripts on DHCP lease](lease-script.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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