On Sat 14 Dec 2019 at 13:49:25 (-0500), Jape Person wrote: > On 12/14/19 1:24 AM, john doe wrote: > > > > Assuming that you are using the router from your ISP, it is possible > > that the firmware has been upgraded without your nolage. > > > > One way to prevent this could be (1), that is, use your own > > router/server/gateway so you control everything on your LAN. > > > > I use an EMTA modem only from my ISP which is plugged into a perimiter > > firewall. > > > > If you can't have an modem from your ISP, look at 'bridgemode'. > > > > If your not comfortable building your server from scratch, you can > > simply buy a router that is accepted by your ISP . > > > > In other words, you need to choose one or the other if you go this way: > > - Modem connected to router (most flexible of all) > > - Combo modem/router in one box (les flexible but is more compact) > > > > If you use DHCP static lease, you should look at what the DHCP server is > > providing as hostname and 'TLD', and also in the dhcp client (dhclient' > > to see what you get from the DHCP server. > > > > The file '/etc/resolv.conf' should let you know what TLD is sent from > > the DHCP server. > > > > Debian shouldn't modify your configuration files '/etc' without your nolage.
Depending on the packages chosen, /etc/resolv.conf is one file in /etc that is modified by Debian. The resolvconf package lists 23 other programs that it is designed to adjudicate between, for want of a better term. > > Note that the TLD '.lan' is sometime used. That's another choice, like .local, that could always be issued as a real TLD at some point in the future. > > 1) https://www.xfinity.com/support/articles/list-of-approved-cable-modems > > I'm using my own router behind the modem provided by the ISP. I've > never used a router provided by an ISP for controlling my network. > > I'm using a Luxul XWR-1750 which has been kept on the latest firmware > available. Last upgrade was done early this year, long before the > noted change in names. > > The router is set to provide static IP addresses and has the names of > each of the systems associated with their MAC Addresses and IP > Addresses. Can you just clarify this? My router provides static IP addresses on the basis of the MAC addresses, all the information being typed in¹ by me. It also lists the names of the other hosts, but only because those hosts told it their names. IOW the router (cheap, $35) doesn't issue hostnames, nor provide a DNS service itself. It also neither knows nor cares what the domain name of the network is. How much of this is the same on the router in your network? ¹ actually, of course, it deduces all but the last number in the dotted quad. Cheers, David.