linux_wiki:nc

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linux_wiki:nc [2018/02/06 11:39]
billdozor [Useful Arguments]
linux_wiki:nc [2019/05/25 23:50]
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-====== NC (netcat) ====== 
- 
-**General Information** 
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-nc or netcat "is a feature-packed networking utility which reads and writes data across networks from the command line." 
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-**Checklist** 
-  * Distro(s): Any 
- 
----- 
- 
-====== Useful Arguments ====== 
- 
-**EL6** 
-  * -n → do not perform DNS lookups 
-  * -u → use UDP instead of default TCP 
-  * -v → verbose 
-  * -w 3 → wait 3 seconds before timeout of initial connection 
-  * -z → Scan only 
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- 
-**EL7** 
-  * -n → do not perform DNS lookups 
-  * -u → use UDP instead of default TCP 
-  * -i → Idle read/write timeout (disconnect after successful connection) 
-  * -v → verbose 
-  * -w 3 → wait 3 seconds before timeout of initial connection 
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----- 
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-====== Examples ====== 
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-Netcat examples. 
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-===== Test Port Reachability ===== 
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-Test to see if you can open a connection to a port on a remote system.\\ 
-This is useful to see if a firewall has correct rules. 
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-Example: Check the remote system (192.168.1.1) for an open 443/tcp connection 
-  * EL6<code bash>nc -zvw 3 192.168.1.1 443</code> 
-  * EL7<code bash>nc -i 3 -vw 3 192.168.1.1 443</code> 
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  • linux_wiki/nc.txt
  • Last modified: 2019/05/25 23:50
  • (external edit)