配置Ip-forward参数备忘。
1 Config the ip_forward option
1.1 Config ip_forwarding in CentOS6
vim /etc/sysctl.conf
net.ipv4.ipforward = 1
sysctl -p /etc/sysctl.conf
1.2 Config ip_forwarding In CentOS7
vim /usr/lib/sysctl.d/00-system.conf
net.ipv4.ip_forward = 1
sysctl -p OR systemctl reboot
2 Check the ip_forward status
2.1 Check the ip_forward setting
cat /proc/sys/net/ipv4/ip_forward
net.ipv4.ip_forward = 1
status 1 --- forward is active