Encryption is important, as it hides identifiable information that the user is entering. This is not always easy because in order to sniff traffic, the attacker usually needs to have physical access to the network.Īssuming the person performing the attack is present within the network, there is a lot of information that can be discerned from analyzing packets. Perhaps one of the most publicized hacking activities that are performed with Wireshark is packet interception. In fact, we looked at how we can find login details for Telnet by using Wireshark in this article here. Wireshark is the default packet analyzer for many network professionals, so it should come as no surprise that this powerful freeware tool can also be used for malicious purposes. Most Intrusion Detection/Prevention Systems (NIDS/NIPS) are able to find network scanning activity when it is present on the network, so if it is an unsanctioned activity, it can be quickly identified and stopped.Ī copy of Angry IP Scanner can be downloaded here. Angry IP Scanner can also find fetchers that relate to each target machine such as TTL, open ports, filtered ports, web detect, HTTP sender, comments, NetBIOS information, MAC address, MAC vendor and even packet loss. Angry IP Scanner is able to identify targets so that other tools can be used to further the attack. Mapping the network and the devices that are present is one of the quickest and easiest ways to find potential targets. The most obvious one is reconnaissance work by a potential attacker. However, these same features can also be used for malicious purposes. This is very useful with the many different IoT devices that use ethernet and Wi-Fi to connect to modern networks. This is especially helpful where there are newly configured devices that haven’t yet been documented, or as a troubleshooting step when trying to diagnose connectivity issues.Īngry IP Scanner is able to scan multiple broadcast domains and find out network host information such as the network name, IP address and MAC address. Please do not consider Angry IP Scanner as a ‘hacktool’ or something similar.IP scanners are legitimate tools that can help users to discover devices they weren’t aware of on the network. Please note that while theoretically Angry IP Scanner can be used by crackers, in fact it was not intended for doing so, thus the lack of stealth scanning methods. This program is mostly useful for network administrators to monitor and manage their networks.įor more information about IP and port scanning in general, you can see the corresponding article on Wikipedia. The program is written and maintained by Anton Keks ( tech blog, photography), who is a software craftsman and co-founder of Codeborne, an agile software development company. LicenseĪngry IP Scanner is free and open-source software, so use it at your own risk. Read the longer essay with theory of network scanning and the reasoning behind the project. Is scanning of computer networks dangerous? - presentation from the Baltic DB & IS conference.Writing of cross-platform desktops apps - presentation from Jokerconf.The full source code is available, see the download page. In order to increase scanning speed, it uses multithreaded approach: a separate scanning thread is created for each scanned IP address. Anybody who can write Java code is able to write plugins and extend functionality of Angry IP Scanner. With help of plugins, Angry IP Scanner can gather any information about scanned IPs. Scanning results can be saved to CSV, TXT, XML or IP-Port list files. It also has additional features, like NetBIOS information (computer name, workgroup name, and currently logged in Windows user), favorite IP address ranges, web server detection, customizable openers, etc. The amount of gathered data about each host can be extended with plugins. Not requiring any installations, it can be freely copied and used anywhere.Īngry IP scanner simply pings each IP address to check if it’s alive, then optionally it is resolving its hostname, determines the MAC address, scans ports, etc. It can scan IP addresses in any range as well as any their ports. Angry IP scanner is a very fast IP address and port scanner.
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