编辑sshd_config文件：

vim /etc/ssh/sshd_config

PermitRootLogin yes

PasswordAuthentication yes

查看是否开启了防火墙：

service SuSEfirewall2 status

如果开启了则编辑SuSEfirewall2文件，没有则无需往下做：

vim /etc/sysconfig/SuSEfirewall2

FW_SERVICES_EXT_UDP="22"

FW_SERVICES_EXT_TCP="22"

重启sshd和SuSEfirewall2服务：

service sshd restart

service SuSEfirewall2 restart

关闭防火墙

systemctl stop SuSEfirewall2.service

取消开机启动防火墙

systemctl disable SuSEfirewall2.service