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Netcat – command-line options with definitions – tips & tricks

Pentru cine nu stie: netcat este un program (scris la inceput pentru medii unix, apoi a fost porta si pe windows) care este capabil sa citeasca si scrie date peste o conexiune de retea, folosind protocoalele de comunicate TCP or UDP.
Actualele programe antivirus il vad ca pe un “dusman” fiind asociat unui remote access tool. Ceea ce si este de fapt, el putand fi utilizat si in scopuri “nobile” cat si in scopuri “malefice”.

nc –l –p [port] will create a simple listening tcp port. Add –u to put into UDP mode.

nc –e [program] To redirect stdin/stdout from program.

nc –w [timeout] To set a timeout before netcat automatically quits. (Used within a loop usually)

program | nc To pipe output of program to netcat

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nc | program To pipe output of netcat to program

nc –h Help menu

nc –v To put into verbose mode, or use –v –v to put into ultra-verbose mode!

nc –g or nc –G Source routing flags

nc –t Use telnet negotiation (If connecting to a telnetd or acting as a telnetd for telnet clients)

nc –o [file] Hex dump traffic to file

nc –z No I/O (Used for scanning ports)

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    July 18, 2008 · Filed Under IT Security Focus



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