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Create DNS records for DHCP leases
==================================
[⬅️ Go back to main README](../README.md)
> ℹ️ **Info**: This script can not be used on its own but requires the base
> installation. See [main README](../README.md) for details.
Description
-----------
This script adds (and updates & removes) dns records based on dhcp server
leases. An A record based on mac address is created for all bound lease,
additionally a CNAME record is created from host name if available.
Requirements and installation
-----------------------------
Just install the script:
$ScriptInstallUpdate dhcp-to-dns;
Then run it from dhcp server as lease script. You may want to use
[lease-script](lease-script.md).
A scheduler cares about cleanup:
/system/scheduler/add interval=15m name=dhcp-to-dns on-event="/system/script/run dhcp-to-dns;" start-time=startup;
Configuration
-------------
On first run a disabled static dns record acting as marker (with comment
"`--- dhcp-to-dns above ---`") is added. Move this entry to define where new
entries are to be added.
The configuration goes to `global-config-overlay`, these are the parameters:
* `Domain`: the domain used for dns records
* `HostNameInZone`: whether or not to add the dhcp/dns server's hostname
* `PrefixInZone`: whether or not to add prefix `dhcp`
* `ServerNameInZone`: whether or not to add DHCP server name
### Host name from DHCP lease comment
Overwriting the host name from dhcp lease comment is supported, just add
something like `hostname=new-hostname` in comment, and separate it by comma
from other information if required:
/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;
Note this information can be configured in wireless access list with
[dhcp-lease-comment](dhcp-lease-comment.md), though it comes with a delay
then due to script execution order. Decrease the scheduler interval to
reduce the effect.
See also
--------
* [Collect MAC addresses in wireless access list](collect-wireless-mac.md)
* [Comment DHCP leases with info from access list](dhcp-lease-comment.md)
* [Create DNS records for IPSec peers](ipsec-to-dns.md)
* [Run other scripts on DHCP lease](lease-script.md)
---
[⬅️ Go back to main README](../README.md)
[⬆️ Go back to top](#top)
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