DHCP leases to Static IP interface on Ubuntu26 and deletes A record
Author: D1StrXCreated Sep 12, 2026Updated Sep 14, 2026
Specifically on Ubuntu 26.04 machines that have a static IP set, Technitium DHCP leases an IP on reboot of the Ubuntu 26.04 host and/or deletes the A record randomly of that host. (host.domain.tld). Probably because the lease expired.
Only worthy thing I can see in the logs is
Check for update was done {dnsServerEnableCheckForUpdate: True; updateAvailable: False; updateVersion: 15.4;}But even with dhcp4: false set in netplan and applying that, after a reboot it consistently updates the A record with a DHCP IP.
Source: TechnitiumSoftware/DnsServer