Netcat exe download




















I have been using netcat for ages and works great in IPv4 environments. 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 seen some people having issues with nc6. The -v is for verbose. It tells you a little info about the connection when it starts. It is a bit easier to just open the connection and then type at the console to do the same thing. You will see the same thing as above.

A far more exciting thing to do is to get a quick shell going on a remote machine by using the -l or "listen" option and the -e or "execute" option. You run Netcat listening on particular port for a connection.

When a connection is made, Netcat executes the program of your choice and connects the stdin and stdout of the program to the network connection. When it gets connected to by a client it will spawn a shell cmd. The -t option tells Netcat to handle any telnet negotiation the client might expect. This will allow you to telnet to the machine you have Netcat listening on and get a cmd. You could just as well use Netcat instead of telnet: nc xxx.

There is no authentication on the listening side so be a bit careful here. The shell is running with the permissions of the process that started Netcat so be very careful. If you were to use the AT program to schedule Netcat to run listening on a port with the -e cmd.

The beauty of Netcat really shines when you realize that you can get it listening on ANY port doing the same thing. Do a little exploring and see if the firewall you may be behind lets port 53 through.

Run Netcat listening behind the firewall on port Use 'exit' at the command prompt for a clean disconnect. The -L note the capital L option will restart Netcat with the same command line when the connection is terminated.

This way you can connect over and over to the same Netcat process. A new feature for the NT version is the -d or detach from console flag. With Netcat you get to see the full HTTP header so you can see which web server a particular site is running. Since NT has a rather anemic command processor, some of the things that are easy in unix may be a bit more clunky in NT.

For the web page example first create a file get. The -v is for verbose. It tells you a little info about the connection when it starts. It is a bit easier to just open the connection and then type at the console to do the same thing. You will see the same thing as above. A far more exciting thing to do is to get a quick shell going on a remote machine by using the -l or "listen" option and the -e or "execute" option.

You run Netcat listening on particular port for a connection. When a connection is made, Netcat executes the program of your choice and connects the stdin and stdout of the program to the network connection. When it gets connected to by a client it will spawn a shell cmd.

The -t option tells Netcat to handle any telnet negotiation the client might expect. This will allow you to telnet to the machine you have Netcat listening on and get a cmd. You could just as well use Netcat instead of telnet: nc xxx. There is no authentication on the listening side so be a bit careful here. The shell is running with the permissions of the process that started Netcat so be very careful. If you were to use the AT program to schedule Netcat to run listening on a port with the -e cmd.

The beauty of Netcat really shines when you realize that you can get it listening on ANY port doing the same thing. Do a little exploring and see if the firewall you may be behind lets port 53 through. Run Netcat listening behind the firewall on port



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