====== netcat======
[[apps:apps|{{ :apps:icon.jpg?120|}}]]

===== context=====
dit document beschrijft werking van netcat.

===== algemeen=====
  * Zwitsers zakmes voor netwerk dinges
  * kan zowel als client als server ingezet worden
  * zowel TCP als UDP kan ie aan. 
===== client (aka: sender)=====
  * tcp verbinding: ''netcat -v <server> <poort>''\\ <code>netcat -v ad2 389
ad2.domein.net [10.11.12.13] 389 (ldap) open</code>
  * udp verbinding: ''netcat -v -u <server> <poort>''\\ <code>nc -v -u 10.11.12.13 161
fw.domein.net [10.11.12.13] 161 (snmp) open</code>

===== server (aka: receiver)=====
  * inkomende tcp verbinding: ''netcat -v -l -p <poort>''\\ <code>
nc -v -l -p 12345
listening on [any] 12345 ...</code>

===== bestanden (razendsnel) kopieren =====
  * receiver: ''nc -v -l -p 12345 > bestand.iso''
  * verzender: ''nc -v <receiver> 12345 < bestand.iso''
  * idem maar dan met progress bar en byte count(''pv -pb''): <code>nc -v -l -p 12345 |pv -bp > bestand.iso
listening on [any] 12345 ...
connect to [10.11.110.13] from checkmk.legoland.net [10.11.110.75] 44568                                                       ]
 100MiB [    <=>                                                                                                               ]</code>
===== meer info =====
  * [[https://www.ionos.com/digitalguide/server/tools/netcat/|netcat]]
  * [[https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/sec-managing_data_using_the_ncat_utility|redhat article]]
  * [[https://www.varonis.com/blog/netcat-commands|varons article]]
{{tag>apps}}