You might want to test and increase or decrease this timeout if needed. # Maybe nc needs a small time to receive everything. doing some tests I noticed that a timeout of zero sometimes didn't work to catch the message # If the file exists and is not empty, return, we received the message # Append the received messages to msg file, and put the process in the background # Remove instruction from within the loop # While msg file doesn't exist or is empty, do I'm using 'OpenBSD netcat (Debian patchlevel 1.187-1ubuntu0.1)' and, even though the -q flag shows up in the manual, it didn't work as mentioned in cnicutar's answer.

I should mention ncat (coded by the author of nmap), which is a rewrite of netcat.Unfortunately, the -q flag didn't work for me. NC can be used for anything and it's so simple and easy to use! Netcat-1.12 -e (ctrl+c terminate cmd.exe)Īmazing program. This is a very powerful tools for network security detection I'd ever used. Use this tool when you need to know for sure what a port is communicating back to you.

It retains all of the old functionality and adds several nice features such as group chatting complete with a server. The venerable nc relives as ncat and this is a serious update. and the one i like most is the backdooring capabilities I have seen some people having issues with nc6. Do you guys use it also in IPv6 networks? I know about the v6 version (nc6) but I'm not sure how stable it is in IPv6 cases. I have been using netcat for ages and works great in IPv4 environments. The tool is 'old' and simple, but still is actual and useful. Very cool tool for linux administration & pentesting issues. Thanks to dev it's a very good tool ! Can be used on alls Windows, 7,8,10 :)

Long live netcat! One that swiss knife is the best. Other takes on this classic tool include the amazingly versatile Socat, OpenBSD's nc, Cryptcat, Netcat6, pnetcat, SBD, and so-called GNU Netcat. The flexibility and usefulness of this tool prompted the Nmap Project to produce Ncat, a modern reimplementation which supports SSL, IPv6, SOCKS and http proxies, connection brokering, and more. It can sometimes even be hard to find a copy of the v1.10 source code. The original Netcat was released by Hobbit in 1995, but it hasn't been maintained despite its popularity. In this tutorial, we’ll be covering the Netcat utility, or nc command, in detail. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need, including port binding to accept incoming connections. Netcat is one of the most versatile networking tools for system administrators it is called the Swiss army knife of Networking. It is designed to be a reliable back-end tool to use directly or easily drive by other programs and scripts. This simple utility reads and writes data across TCP or UDP network connections.

Nc netcat to site