[root@localhost wj]# rpm -qa | grep telnet

[root@localhost wj]# yum install -y telnet-server //telnet服務器端，允許其他電腦連接

Installed:

telnet-server.i686 1:0.17-48.el6

Complete!

[root@localhost wj]# yum install -y telnet //telnet客戶端，可以連接其他電腦

Installed:

telnet.i686 1:0.17-48.el6

Complete!

[root@localhost wj]#gedit /etc/xinetd.d/telnet

# default: on

# description: The telnet server serves telnet sessions; it uses \

# unencrypted username/password pairs for authentication.

Service telnet

{

flags = REUSE

socket_type = stream

wait = no

user = root

server = /usr/sbin/in.telnetd

log_on_failure += USERID

disable = no //這個默認是yes，只有改成no才可以啟動telnet

}

[root@localhost wj]# gedit /etc/service

telnet 23/tcp //為了防止被攻擊，一般都不會使用23端口。註意這裏的23端口要使用tcp和udp兩種協議

telnet 23/udp

[root@localhost wj]# gedit /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 23 -j ACCEPT

-A INPUT -m state --state NEW -m udp -p udp --dport 23 -j ACCEPT

[root@localhost wj]# service iptables restart

iptables：將鏈設置為政策 ACCEPT：filter nat [確定]

iptables：清除防火墻規則： [確定]

iptables：正在卸載模塊： [確定]

iptables：應用防火墻規則： [確定]

iptables：載入額外模塊：nf_conntrack_ftp [確定]

[root@localhost wj]# service xinetd restart //telnet依賴xinetd

停止xinetd： [確定]

正在啟動xinetd： [確定]

[root@localhost wj]# telnet 192.168.0.119

Trying 192.168.0.119...

Connected to 192.168.0.119.

Escape character is ‘^]‘.

CentOS release 6.5 (Final)

Kernel 2.6.32-431.el6.i686 on an i686

login: david

Password:

Last login: Thu Aug 16 08:24:19 from 192.168.0.119

already login