2022-02-11 20:24:15 +01:00
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# DNS update script
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Source: http://www.btteknik.net/?p=143
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2022-02-11 20:45:24 +01:00
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### Requirements
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* DiG
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2022-02-11 20:24:15 +01:00
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### DNSSEC key
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* need to create a dnssec key, so that we can authenticate clients' updates
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```
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# ddns-confgen -s myhost.example.com
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```
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* this key must be:
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* added to DNS server's `named.conf` and associated to required zones
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* stored in a text file in the same directory as the script as `dns.key`
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### Install script
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You may run `install.sh` (not as root, it includes `sudo`s) to:
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* copy Systemd units templates to system directory
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* enable timer for next reboot
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* NOTE: if you move the script, you need to install again
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2022-03-14 21:25:01 +01:00
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### TODO
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* review this README
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2022-02-11 20:24:15 +01:00
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### Issues
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#### Cannot restrict PTR update
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* We meet an issue when trying to use `tcp-self` in BIND9 zone config
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* https://superuser.com/questions/977132/when-using-nsupdate-to-update-both-a-and-ptr-records-why-do-i-get-update-faile
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* http://www.zytrax.com/books/dns/ch7/xfer.html#update-policy
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2022-08-20 21:02:01 +02:00
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### Discussions
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#### Dynamic DNS update with ISC DHCP server
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* Use case: DHCP server without fixed addresses
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* `ddns_update` (or something like that) in ISC DHCP Server is something to look into
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* https://flylib.com/books/en/2.684.1/configuring_a_dhcp_server_to_update_a_bind_name_server.html
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* is it required? see 8.10.3
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