On and off I've tried to keep tabs using the limited functionality of my ISP provided router, but it's hardly robust, and to be fair, it's probably not a big enough risk to justify forking out for a network scanner. More fully featured enthusiast routers can provide this info in spades, of course, and even consumer routers with third party firmware like DD-WRT give you much more control. But what about normal people? Or those, like me, who can't replace their router firmware?
If you have a PC of some kind, there are certainly some good option, but there is usually some set up involved, and often limitations unless you choose to pay up. Then there is the mobile space, and in particular, a handy little app called Fing.
Fing is billed as a 'super-fast network scanner', and that's pretty much what it does, at least originally. Fing itself offers network scanning of the local subnet, device port scanning, and connectivity testing to local or remote addresses. Pretty simple stuff. However, the execution is slick and offers some nice additions to assist in keeping track of the growing list of devices in our homes. Firstly, for each device it detects, it will attempt to identify the device based on some known identifiers.
It does a pretty good job and greatly helps in thinning out the list that you need to track down further. Once you've identified a device, you can optionally name it and select a handy icon from a large library , and give it a location to help you keep track. Second, Fing will keep track of the history of devices over time, and can keep an event log of when things were first noticed and when it saw them go on or offline.
This can help track things down, but also acts as a diagnostic of potential issues on the network. You can ping the device to test it's connection stability, and do a port scan to check for vulnerable open ports.
Locate devices on your wireless network in seconds with Fing - TechRepublic
Fing is a tool for network scanning and discovery that allows administrators to troubleshoot their network easily and at the speed of light. Once installed on a supported OS, your home, office and corporate network are just one click away. You can scan and discover all the networks, at an amazing speed. In less than 5 seconds, you get a perfect image of your Local Area Network, and the more you discover, the less time and resources you need. You can easily include Fing in your daily activities: routines, scheduled tasks, report generation. Home Questions Tags Users Unanswered.
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If it is the second - what would that algorithm look like? Philip Kirkbride 2, 6 6 gold badges 47 47 silver badges bronze badges.
Thanks to Misuse, Apps Can’t View MAC Addresses on iOS 11
Bruce Ediger Bruce Ediger I was looking for some weird raw socket thing, and I was surprised to see the connect calls show up. I did not look through nmap source code, however, and I also just ran "nmap -sn This looks like a solid approach, I guess my lack of experience in the area limited my ability to peice together the tools to solve the problem - despite having used tcpdump in the past. When I get back to the office - I will realy dig into this. After looking over the source code in nmap.. When true, it does the raw socket thing.