修改linux的SSH的默认端口
by:授客 QQ：1033553122
安装完linux后，默认的情况下ssh是开放的，容易造到黑客攻击，简单有效的操作之一就是修改默认端口号
步骤一：修改/etc/ssh/sshd_config配置文件
找到行：Port 22 注释掉，添加行：Port其它端口号
builder:/mnt/disk/pcap# vim /etc/ssh/sshd_config
# Package generated configuration file
# See the sshd(8) manpage for details
# What ports, IPs and protocols we listen for
#Port 22
Port 50000
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#ListenAddress 0.0.0.0
Protocol 2
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes
# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 768
# Logging
注意：这里的端口修改会影响SCP、SSH等命令的使用，因为执行命令时使用的这里的端口
步骤二：重启服务
builder:/mnt/disk/pcap# service sshd restart