Difference between revisions of "Checking ports with netcat"

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(portscan)
(checking udp ports)
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== checking udp ports ==
 
== checking udp ports ==
  
~% '''nc -vzu 192.168.1.1 53'''
+
~% '''nc -vzu 192.168.1.1 53'''
  
 
examplehostname [192.168.1.1] 53 (domain) open
 
examplehostname [192.168.1.1] 53 (domain) open
  
~% '''nc -vzu 192.168.1.1 54'''
+
~% '''nc -vzu 192.168.1.1 54'''
  
 
examplehostname [192.168.1.1] 54 (?) : Connection refused
 
examplehostname [192.168.1.1] 54 (?) : Connection refused
 +
 
== portscan ==
 
== portscan ==
  

Revision as of 07:32, 11 April 2014


checking tcp ports

~% nc -vz 192.168.1.1 80

examplehostname [192.168.1.1] 80 (http) open

~% nc -vz 192.168.1.1 80

examplehostname [192.168.1.1] 80 (http) : Connection refused ~

checking udp ports

~% nc -vzu 192.168.1.1 53

examplehostname [192.168.1.1] 53 (domain) open

~% nc -vzu 192.168.1.1 54

examplehostname [192.168.1.1] 54 (?) : Connection refused

portscan

# for i in {1..1024}; do nc -vz -w 1 192.168.1.1 $i; done