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Diffstat (limited to 'doc/dhcp-to-dns.md')
| -rw-r--r-- | doc/dhcp-to-dns.md | 63 |
1 files changed, 54 insertions, 9 deletions
diff --git a/doc/dhcp-to-dns.md b/doc/dhcp-to-dns.md index 699b6a5..13d5ef3 100644 --- a/doc/dhcp-to-dns.md +++ b/doc/dhcp-to-dns.md @@ -1,12 +1,24 @@ Create DNS records for DHCP leases ================================== -[◀ Go back to main README](../README.md) +[](https://github.com/eworm-de/routeros-scripts/stargazers) +[](https://github.com/eworm-de/routeros-scripts/network) +[](https://github.com/eworm-de/routeros-scripts/watchers) +[](https://mikrotik.com/download/changelogs/) +[](https://t.me/routeros_scripts) +[](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=A4ZXBD6YS2W8J) + +[⬅️ 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 removes) dns records based on dhcp server leases. +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 ----------------------------- @@ -20,7 +32,7 @@ Then run it from dhcp server as lease script. You may want to use 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; + /system/scheduler/add interval=15m name=dhcp-to-dns on-event="/system/script/run dhcp-to-dns;" start-time=startup; Configuration ------------- @@ -29,20 +41,53 @@ 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: +The configuration goes to dhcp server's network definition. The domain is +used to form the dns name: + + /ip/dhcp-server/network/add address=10.0.0.0/24 domain=example.com; + +A bound lease for mac address `00:11:22:33:44:55` with ip address +`10.0.0.50` would result in an A record `00-11-22-33-44-55.example.com` +pointing to the given ip address. + +Additional options can be given from comment, to add an extra level in +dns name or define a different domain. + + /ip/dhcp-server/network/add address=10.0.0.0/24 domain=example.com comment="domain=another-domain.com, name-extra=dhcp"; + +This example would result in name `00-11-22-33-44-55.dhcp.another-domain.com` +for the same lease. + +If no domain is found in dhcp server's network definition a fallback from +`global-config-overlay` is used. This is the parameter: * `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 + +> ℹ️ **Info**: Copy relevant configuration from +> [`global-config`](../global-config.rsc) (the one without `-overlay`) to +> your local `global-config-overlay` and modify it to your specific needs. + +### 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) +[⬅️ Go back to main README](../README.md) +[⬆️ Go back to top](#top) |