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We support Nmap on Windows 7 and newer, as well as Windows Server 2008 and newer. We also maintain a guide for users who must run Nmap on earlier Windows releases. The Nmap executable Windows installer can handle Npcap installation, registry performance tweaks, and decompressing the executables and data files into your preferred location. Compile Netcat on Windows using MinGW. Last Modified: Tue, 15 Jan 2019 18:01:58 +0000; Created: Tue, 08 Sep 2009 16:58:50 +0000 I wanted a way to compile Netcat on Windows using MinGW so I could have a version without the GAPINGSECURITYHOLE option (-e command line option). This helps to avoid the annoyance of anti-virus tools reporting it as.

1. How To Install Netcat On Windows 7 32-bit
2. How To Install Netcat On Windows 7 64-bit

What is Netcat? All NetCat Commands

By Chandan Singh

Netcat utility is often called “Swiss Army Knife”, in the good sense of the word. The netcat functionality is useful to the same extent that the versatility and handiness of the reputable pocket Swiss Army Knife is useful. Some of its features include port scanning, file transfer, port listening, and it can be used as a backdoor. In 2006, netcat got the 4th place in the survey “100 Network Security Utilities”, so it is definitely the tool you need to know.

How to install NetCat?

If you have Debian or a system based on Debian, such as Ubuntu, do the following:

If you have Fedora or a Fedora based system such as CentOS, do:

If you have Slackware, FreeBSD, NetBSD, Solaris, or Mac, download the nc sources and do:

Another way to do this on a Mac is if you have MacPorts:

How To Install Netcat On Windows 7 32-bit

On Slackware, you can install it as a package from the package directory:

If you have Windows, download from here.

How to use NetCat?

Let’s start with a few simple examples and then we will use them as basic ones.

If you remember, I said that netcat is a Swiss army knife. What would this knife be if it could not be used as an ordinary knife? This is why netcat can be used instead of the usual telnet:

In fact, it is more convenient than regular telnet, because you can terminate the connection at any time by pressing Ctrl + C and it processes binary data as normal (no escape sequences, nothing).

You can add the “-v” parameter to display the action results in more detail, and the (-vv) parameter to get statistics on how many bytes were transferred during the current connection session.

Netcat can be used as a server. If you run it as shown below, it will listen on port 12345 (on all interfaces):

Now if you connect to port 12345 of this host, everything you dial will be transferred to the remote side, which tells us that netcat can be used as a chat server. Run on one of the computers:

How To Install Netcat On Windows 7 64-bit

And connect to it from another:

Now both sides can talk!

This way of talking, when both parties can talk to each other makes it possible to use nc for I / O operations over the network! For example, you can send a whole directory from one computer to another by arranging the tar pipeline through nc on the first computer, and redirecting the output to another tar process on the second.

Suppose you want to send files from the directory / data of computer A with IP 192.168.1.10 to computer B (with any IP). It’s simple:

Do not forget to combine the pipeline with the Pipe Viewer , which was described in the previous article, to see the statistics of how fast the transfer takes place!

A single file can be sent easier:

You can even copy and restore the whole disk using nc:

Note: The “-l” option cannot be used with “-p” on Mac computers! The solution is simply to replace “-l -p 6666? on “-l 6666 ?. Like here:

Exceptional use of netcat – port scan. Netcat is not the best tool for such work, but it copes with it (the best, of course, nmap):

The “-n” option prevents DNS lookups, “-z” does not wait for a server response, and “-w 1? sets the timeout for the connection to 1 second.

Another non-trivial use of netcat as a proxy. Both port and host can be redirected. Take a look at this example:

This command starts nc on port 1234 and redirects all connections to google.com:80. If you now connect to this computer on port 12345 and make a request, you will find that you do not receive any data in response. This is correct because we have not established a bidirectional channel. If you add a second channel, you will receive your data on another port:

After sending a request to port 12345, receive your response data on port 12346.

Probably the most powerful feature of netcat is to run any process as a server:

The “-e” option affects the execution of input and output redirected through a network socket. Now, if you connect to a host on port 12345, you can use bash:

The implications are that NetCat is a popular hacker tool and it can be used to make a backdoor very easily. On a Linux server, you can run / bin / bash and on Windows cmd.exe and have full control in your hands.