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d700dbc00e
The lease comment is supposed to be a human readable string... But we could allow parsable information.
68 lines
2.3 KiB
Markdown
68 lines
2.3 KiB
Markdown
Create DNS records for DHCP leases
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==================================
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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 `global-config-overlay`, these are the parameters:
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* `Domain`: the domain used for dns records
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* `HostNameInZone`: whether or not to add the dhcp/dns server's hostname
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* `PrefixInZone`: whether or not to add prefix `dhcp`
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* `ServerNameInZone`: whether or not to add DHCP server name
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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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