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一、Telnet
1.
rpm -qa|grep telnettelnet
telnettelnettelnetxinetd
2. Telnet
vi /etc/xinetd.d/telnettelnetdisable=yesdisable=notelnet
service xinetd starttelnet
telnet iptelnet 192.168.99.199telnet192.168.99.199.
windowstelenetlinuxrootlogin incorrecttelnetroottelnetlinux
3. telnet
telnettelnetvi /etc/xinetd.d/telnettelnet
bind=192.168.99.9 #IP
only_from=192.168.99.0/24 #192.168.99.0--192.168.99.255telnettelnet
no_access=192.168.99.{11,13} #192.168.99.11192.168.99.13IPtelnet
access_times=8:00-12:00 14:00-16:00 #telnet
4. telnet
telnet232300
vi /etc/servicestelnet 23/tcptelnet 23/udptelnet 2300/tcptelnet 2300/upd
5. root
telnetrootmv /etc/securetty /etc/securetty.bak telnetrootroot
二、OpenSSH
telnetSSHSSHSSH
1.
OpenSSHrpm -qa|grep opensshopenssh
2. windows
windows xpsshwindowssshwindowssshWinSCPputtyWinSCPWinSCP
IP
wenjian
WinSCPwindows
WinSCP
LinuxPuTTYIPSSH
yes
linuxroot
3. SSH
sshSSH
1vi /etc/ssh/sshd_configSSH
Protocol 2 # SSH1SSH2SSH2
ServerKeyBits 1024 #ServerKey1024
PermitRootLogin no # root
PasswordAuthentication no #
PermitEmptyPasswords no #
2SSH
vi /etc/hosts.denysshdALLSSH
SSHvi /etc/hosts.allowsshd:192.168.99. 192.168.99.0/24SSHIPSSH
SSH
PuTTY
4.
admin
OK/home/admin/.ssh/id_rsa
5.
PuTTY
PuTTYPuTTYGen
PuTTYGenLoad
Save private key
6. putty
PuTTYAuthBrowse
Session
Host NameIPSaved SessionsSave
注意：這裏的密碼不是用戶密碼，而是剛纔建立私鑰時設置的密碼。
OKSSH
SSH
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