1、准备俩台服务器,都要有俩块网卡,外网网卡,内网网卡
第一台服务器 内网:172.16.1.16 外网:10.0.0.16
第二台服务器 内网:172.16.1.17 外网:10.0.0.17
2、在第一台服务器上添加
[root@ localhost ~]# vim /etc/sysctl.conf # sysctl settings are defined through files in # /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/. # # Vendors settings live in /usr/lib/sysctl.d/. # To override a whole file, create a new file with the same in # /etc/sysctl.d/ and put new settings there. To override # only specific settings, add a file with a lexically later # name in /etc/sysctl.d/ and put new settings there. # # For more information, see sysctl.conf(5) and sysctl.d(5). net.ipv4.ip_forward=1 #在这里添加一行
3、进行检查
[root@ localhost ~]# sysctl -p net.ipv4.ip_forward = 1
4、添加
[root@ localhost ~]# firewall-cmd --add-masquerade --permanent success [root@ localhost ~]# firewall-cmd --permanent --direct --passthrough ipv4 -t nat -I POSTRPUTING -o ens37 -j MASQUERADE -s 172.16.1.0/24 success [root@ localhost ~]# firewall-cmd --reload success
5、在第二台服务器上进行操作,先关闭外网
[root@ localhost network-scripts]# ifdown ens33
6、在第二台服务器的内网网卡中加入第一台服务器的外网ip
GATEWAY=172.16.1.16
7、重启网卡
systemctl restart network
8、尝试连接百度
ping baidu.com