I didn’t dare ask you how. :embarrassed:
Tomorrow I will go and connect my laptop on subnet1 and subnet 2 to collect data.
Thank you for helping.
Router 1 : No
As it is an ISP hardware, configuration is limited to general use.
And as the caretaker’s home is connected to subnet 1 for internet and television, and television is a service available only from port #4 (for connection of a TV decoder) I cannot ask for configuration change.
Router 2 : yes available, but not configured. And as TSU and deano_ferrari told there is a lot of work to do.
Let’s talk about basics for a moment about some main options…
SNMP - One of many ways to authenticate to one or more devices in a network. You can enable SNMP on every device and then connect to, and query that device… And SNMP is supported by just about everything… not just routers but every Server and Workstation, practically every device. And yes, that includes Linux and Windows boxes, too. But, if your objective is to simply retrieve the MAC addresses of hosts in the network, there is an alternative to connecting to every host in the network, certain devices will have information on a number of those hosts. Routers will know about any devices they connect to directly. For that matter, not just routers but every host machine in a network potentially knows about every other host on that network depending on how much ARP and NetBIOS activity there may be. Also, services like DHCP match MAC addresses to IP addresses and maintain a table of such leases. So, you have many options where to find MAC addresses. But, of course the requirement to use SMNP is that the device you query has to have that set up already, and for security reasons SNMP is not always enabled (only requires a password and community name and nothing else!)
LDAP, Active Directory, NIS, Local logon, etc - Because SNMP is not typically enabled or even advisable for small networks, there are many other possible ways to authenticate to a machine you want to query. These are all common ways network scanners do so to obtain info like MAC addresses and not all require unsual setups but do require knowledge of the target machine’s security.
An installed agent - All the above options until now describe your connecting directly to the target machine and then querying for what you want. You can instead have something installed on the remote network that gathers the information you want, then sends the information to you. So, for instance you could write a script that scans the local network and stores MAC addresses in a file, then would send the results to you. You could email that script to your caregiver, have her execute the script and just wait for the results.
TSU
And then ?
Once you can authenticate, then the scanner will return the MAC address.
A couple days ago, I did a quick search for scanners that will return MAC addresses with authentication, although I haven’t used it for expressly this purpose, nmap is supposed to do this.
TSU