Old clients showing in the Top Clients

[deHakkelaar]

Also, whats make model of the router?

How to get rid of "ghost" DNS servers

I'll have to lookup. Report back shortly. Below says a USG device stores double or old names in /etc/hosts: https://gathering.tweakers.net/forum/list_message/65727160#65727160 EDIT: Ow USG = Unifi Security Gateway from Ubiquiti