Thinking Out Loud

August 17, 2016

Quick note on using nc (netcat)

Filed under: linux — mdinh @ 12:43 pm

Due to security hardening, telnet is not available.

$ rpm -q --whatprovides nc
nc-1.84-24.el6.x86_64

$ yum list nc
Loaded plugins: refresh-packagekit, security
epel/metalink                                                                                                           |  11 kB     00:00
epel                                                                                                                    | 4.3 kB     00:00
epel/primary_db                                                                                                         | 5.9 MB     00:03
public_ol6_UEKR3_latest                                                                                                 | 1.2 kB     00:00
public_ol6_latest                                                                                                       | 1.4 kB     00:00
Installed Packages
nc.x86_64                                                    1.84-24.el6                                                     @public_ol6_latest

$ nc -v -z -w 3 stackoverflow.com 80; echo $?
Connection to stackoverflow.com 80 port [tcp/http] succeeded!
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