Monthly Archives: 12월 2015

Linux Iptable default security ruleset

If you want to more higher security level of network. i recommend to use iptables. Default ruleset need to ssh and outbound accept. #Default Ruleset

And, if you need to connect some service per host. i recommend to open the ip level.   #IP level open

  Then, finally save the iptables

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SUDO add to user

Frist you need to change to permission at /etc/sudoers 640  

Then open to /etc/sudoers

Finally change to file permission at /etc/sudoers 640