1.查看SSH服务
serveice sshd status
--> Checking for service sshd running
2.开启SSH服务
service sshd start
--> starting SSH daemon
3.临时关闭防火墙（环境重启之后，防火墙又会关闭）
rcSuSEfirewall2 stop
4.永久关闭防火墙
chkconfig SuSEfirewall2_init off
chkconfig SuSEfirewall2_setup off
分操作系统
SUSE11下：
关闭操作为：
service SuSEfirewall2_setup stop
service SuSEfirewall2_init stop
取消开机启动防火墙：
chkconfig SuSEfirewall2_init off
chkconfig SuSEfirewall2_setup off
启动操作为：
service SuSEfirewall2_setup start
service SuSEfirewall2_init start
取消开机启动防火墙：
chkconfig SuSEfirewall2_init on
chkconfig SuSEfirewall2_setup on
suse12下操作为：
关闭防火墙
systemctl stop SuSEfirewall2.service
取消开机启动防火墙
systemctl disable SuSEfirewall2.service
开启防火墙
systemctl enable SuSEfirewall2.service
开机启动防火墙
systemctl start SuSEfirewall2.service