On 11/08/2019 22.36, Dave Howorth wrote:
On Sun, 11 Aug 2019 22:05:40 +0200 "Carlos E. R." <robin.listas@telefonica.net> wrote:
I said that most new devices come from factory with that address, till you change it. That has been the procedure for many years.
Your experience differs from mine then. Most devices (all, IIRC) that I attach to my network get an IP4 address by sending a DHCP request which is answered by my router. I can then discover what address has been assigned by looking at the router's web page, and change it or assign it a static address if I desire.
I believe some of the recent IoT devices can also be told to configure themselves to present a wireless AP, which you then connect to with a phone or whatever and tell it about your local environment. You then reboot it and it connects to your network.
I haven't ever come across any device that comes up with a fixed address, except for routers which always do IME, and usually but not always as 192.168.1.1. The Fritz!Box comes up as 192.168.178.1 initially, for example.
Well, most of the devices I configure are routers, that may explain why most of those I get come with a fixed address. But also some other devices. Switches, perhaps? One IoT gadget came configured for dhcp, then the Windows app searches for it poking at every IP for a particular response. In Linux, nmap can do similar, if you know the expected response (but they don't explain this). The Chromebook configures via Bluetooth and a WiFi access point it sets up. The BT for identification at least, it prints an ID code on the TV. Then it gets configuration details for the local WiFI out from your own phone, and switches to it. But it does not say what IP it gets, that I had to find out myself somehow. That HP printer also has an LCD panel where we can write an IPv4 address directly. It is the only gadget I have (besides computers/tablets/phones) that says IPv6 supported. Probably the Chromebook too. -- Cheers / Saludos, Carlos E. R. (from 15.0 x86_64 at Telcontar)