If you want to see if any hosts on your local network are accepting connections on a specific port, simply click the settings button immediately to the right of the IP Range fields. In the settings window that pops up, click on the Ports tab, and look for the field at the very bottom. Enter in a single port, such as 80 to search for web servers on your local subnet. If you wish, you can scan for a range of ports using the same settings menu. Be warned: these scans can take much longer.
However, you do have the option of scanning for open ports in a wide range such as This is incredibly useful when you need to analyze large amounts of data in a spreadsheet or other type of file. There are several tools that allow you to interact with hosts that were discovered as a result of the scan ping, traceroute, telnet, etc.
Question 2 years ago on Step 6. Anybody who can write Java code is able to write plugins and extend functionality of Angry IP Scanner. In order to increase scanning speed, it uses multithreaded approach: a separate scanning thread is created for each scanned IP address. The full source code is available, see the download page. Here Are 12 Fixes. Affiliate Disclosure: Make Tech Easier may earn commission on products purchased through our links, which supports the work we do for our readers.
Is this article useful? Yes No. Never Miss Out Receive updates of our latest tutorials. Sign up for all newsletters. I would like to receive newsletters via email. We will not share your data and you can unsubscribe at any time. Comments 2. Facebook Tweet. Jun 2, at pm. Jun 3, at am. There are many reasons why particularly Angry IP Scanner needs to be cross-platform. One of them is that most of the users still use Microsoft Windows, however it is the worst platform for network scanning, so Angry IP Scanner needs to support both popular platforms and the more useful, but less popular ones.
When considering the possibilities of creating cross-platform applications, there are not many. High level scripting languages often do not perform good enough and are too high level for such networking applications as Angry IP Scanner. Java has the best development tools of any language, good enough productivity, wide platform support, very large developer community, several independent vendors including the GNU open-source implementation , strict standardization. In addition to that, Sun Microsystems, the primary developer of Java, have declared their implementation of Java as open-source during the JavaOne conference; in the past few years they have started pushing the adoption of Java to desktops very aggressively to complement the dominance in server-side enterprise systems market.
In other words, Java has been the biggest success of any software technology ever. Only some GUI tweaks and low-level networking need special attention on different operating systems. This is what JNI Java Native Interface — the way to bind native code with Java is intended for and thus makes this low-level networking possible.
Its benefits include the usage of native GUI controls and widgets on every supported platform, making Java programs indistinguishable from the native ones. And this is important to users — they want their system-wide settings, themes, and operating system standards to be respected. Network scanners can have very wide range of uses, but they can be generally divided into three major categories: attacking, defense, and maintenance.
Attacking usually cannot be performed using a scanner alone: scanning can only retrieve information that can be further used with malicious purposed for an attack, unless a scanner does not flood the network, which can be considered a DoS Denial of Service attack. In all other cases, while it should be noted that scanning itself is not attacking, it still can be used as a part of an attack, that is, with malicious purpose.
Other malicious uses besides attacking or breaking into can include searching for hosts, providing anonymous services for, e. All these uses are not desirable, but if we face the facts, the attackers will have their tools for malicious use anyway, so the goal many security tools such as network scanners is to provide these tools to the people, who need to defend from these attacks and malicious usage of network services.
This brings us to the second category — defense. This is the desired usage of security tools with the goal of finding the same vulnerabilities or misconfigurations as malicious user would do. But again, scanner is only one of the tools that must be used in order to implement a successful defense strategy and successfully secure a network, however it is one of the most important one — it allows finding of the problems that need to be dealt with.
Besides searching for problems, scanning can be used for monitoring with the same goal of keeping the network secure. Monitoring is especially important in the networks where there are many users who control their computers themselves, like ISP and public Wi-Fi networks. These users are often either not experienced enough to protect their computers from threats or they are willingly trying to make something undesirable to the network administrator.
All these different usages require the same basic functionality from the scanner, but all of them also have slightly different usability requirements, which are going to be addressed by Angry IP Scanner. Since the times when Java applets started loosing their popularity due to a number of reasons, including the buggy JVM Java Virtual Machine included in early versions of Netscape Navigator , Java was mostly used on server-side, for generation of Web pages and other enterprise functionality.
This was the price to pay for cross-platformness and security provided by the JVM. Then consumers started to familiarize themselves with Java with the help of their mobile phones and other consumer devices, such as Blu-ray disks. In the meantime, Microsoft has decided to discontinue its Java implementation in favor of their own single-platform clone —.
Desktop Java most notably, the official implementation of it by Sun has been evolving all the time, too, becoming faster and imitating native applications better and better. On the other hand, no Microsoft support means that Java is no longer shipped with Windows, and many people need to install it themselves. However, my own trial has shown that majority of even Windows users already have Java.
Some computer vendors ship Windows with preinstalled Java, some users download it themselves there is a growing number of Java applications, and its very easy to do so , some websites install Java automatically in order to show applets, etc.
All major Linux distributions have GNU Java preinstalled and now thanks to the special licenses from Sun, some even include the official Java as well Ubuntu. So, in the real world, most of the users will either already have Java on their computers or will be able to easily install it in a matter of minutes. Angry IP Scanner is an open-source program. At first sight it may seem that open-source software can be monolithic — users will be able to extend its functionality anyway, by editing the source code.
However, in most cases this is not true. Very often, in order to make a significant change in the code, developer must spend quite a lot of time reading and debugging the code to understand how it works and where to make the exact modification. And it is widely known that reading of code is often more difficult than writing, especially if the original author has not put any effort to make the code extensible.
Now, Linux kernel has modules, which can be either integrated into the base kernel binary, or can be loaded separately on demand. This and some other improvements resulted in much quicker development that can be easily noticed by the increased pace of kernel releases. Thus, if a modular extensible system is in place, any individual is able to add additional functionality to the software with much less effort, because extensibility points are likely to be well documented and have simple interface.
A plugin is usually an external software component that can be loaded dynamically in order to add or extend functionality of the base program. The internal design of Angry IP Scanner aims to be as modular as possible in order to be able to introduce even more either internal extensions or external plugins later.
User selects one feeder prior to scanning and configures appropriately in order to provide the desired sequence of IP addresses to the Scanner. Built-in feeders include:. User selects several fetchers prior to scanning. The list of selected fetchers defines the type and amount of information collected about each scanned IP address.
Built-in fetchers include implemented and planned :. Pingers are used internally by Ping and TTL fetchers , but they are special because subsequent fetchers depend on pinging results for decision whether to continue scanning the address and adaptation of timeouts. The following internal pingers are implemented each appropriate for different situations :. Exporters are used after the scanning has been completed in order to export the results outside of Angry IP Scanner, most often to a file in some format.
Built-in exporters include:. As a rule, openers execute external programs in order to connect or send something to particular hosts, e.
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