![]() In the book The Art of Deception, the author, Kevin Mitnik (convicted hacker) describes many ways systems are compromised. Can you turn them off and firewall your computer so it doesn't respond? Sure. Remember, these services are added for user convenience. You also have to manually configure your printer to not use DHCP because if that IP changes for whatever reason, you have to reconfigure that service again. For example, turn off a zero-conf service and you have to manually configure your printer on your client. These identifiers are shared so that the end user doesn't have to go back to the 1970s and 80s and manually configure services (i.e. When you attempt to prevent this, you are going to find it difficult to strike a balance between user convenience and perceived security. What does this mean? Even your applications are giving up the goods on you. Your browser's User Agent String tells whatever server you connect to what your running including the host operating system. No matter what, even your MAC address (unless you spoof it) is going to give up some of the goods on you. All Fing is doing is utilizing one or more of these (which one they use specifically, I don't know) to do an inventory of the network.Ĭan you prevent this? To a point. These are just some of the services on your client machines that advertise what resources are available. You can obtain all of the MAC addresses on your network segment by pinging your broadcast address. Try it for yourself, paste your MAC address (obtained from ifconfig and see what vendor is identified. The OUI alone can give you a clue as to what computer's identity - there are many free tools on the internet like Wireshark's OUI Lookup Tool. Using Wireshark (FOSS Network Sniffer) and just evaluating what ports respond, you can start building a network map and determine what computers are on your network. SSDP Discovery - Simple Service Discovery Protocol. ![]()
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