These appear to just be informational warnings about DHCP renewals, it sounds like they may be seen with some DHCP configurations, but are not necessarily an indication of an actual problem. Logwatch should probably just filter them.
The debian link (below) has the concise explanation of this warning: >> What is this 'reuse-lease' all about? > > Your DHCP client renews the leased IP although the lease time is not > expired. Not relevant to this problem. > >> Any suggestions, please? > > Clear your DHCP lease file on DHCP server. Bounce the thing by doing: > > $ systemctl stop isc-dhcp-server > rm /var/lib/dhcpd/dhcpd.leases > $ systemctl start isc-dhcp-server > > Make sure that the client is disconnected before doing the above. More info: https://forums.verizon.com/t5/Fios-Internet/Frequent-disconnects-reuse-lease-25-threshold/td-p/872706 http://isc-dhcp-users.2343191.n4.nabble.com/reuse-lease-lease-age-logs-td3231.html#a3237 http://isc-dhcp-users.2343191.n4.nabble.com/Strange-DHCP-behaviour-td2792.html https://lists.debian.org/debian-user/2018/10/msg00809.html ** Changed in: logwatch (Ubuntu) Status: New => Triaged ** Changed in: logwatch (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1578001 Title: unmatched entries for isc-dhcp-server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/logwatch/+bug/1578001/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
