Linux 修改SSH远程端口,Centos如何修改SSH远程端口

1、编辑防火墙配置：vi /etc/sysconfig/iptables

防火墙增加新端口4444

-A INPUT -m state --state NEW -m tcp -p tcp --dport 4444 -j ACCEPT

======================================================================

# Firewall configuration written by system-config-firewall

# Manual customization of this file is not recommended.

*filter

:INPUT ACCEPT [0:0]

:FORWARD ACCEPT [0:0]

:OUTPUT ACCEPT [0:0]

-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

-A INPUT -p icmp -j ACCEPT

-A INPUT -i lo -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT

-A INPUT -m state --state NEW -m tcp -p tcp --dport 4444 -j ACCEPT

-A INPUT -j REJECT --reject-with icmp-host-prohibited

-A FORWARD -j REJECT --reject-with icmp-host-prohibited

COMMIT

重启防火墙,使配置生效:

/etc/init.d/iptables restart

service iptables restart

=======================================================================

2、备份ssh端口配置文件

cp /etc/ssh/ssh_config   /etc/ssh/ssh_configbak

cp /etc/ssh/sshd_config  /etc/ssh/sshd_configbak

修改ssh端口为：4444

vi /etc/ssh/sshd_config

在端口#Port 22下面增加Port 4444

vi /etc/ssh/ssh_config

在端口#Port 22下面增加Port 4444

重启：/etc/init.d/sshd restart

service sshd restart

测试可以用4444端口正常连接。

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