´À·È´Âµ¥ .ssh ÂÊ¿¡ ¼³Á¤À» Á¶±Ý º¯°æÇÏ¿´½À´Ï´Ù.
vi /etc/ssh/sshd_config
UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
UseDNS no