2018-03-27   09:18:14

1.临时开启,(写入内存,在内存中开启)

echo "1" > /proc/sys/net/ipv4/ip_forward

2.永久开启,(写入内核)

echo "net.ipv4.ip_forward = 1" >> /etc/sysctl.conf 

sysctl -p               ----加载,使得配置文件立即生效

 

检查:

sysctl -a |grep "ip_forward"    

------->

net.ipv4.ip_forward = 1
net.ipv4.ip_forward_use_pmtu = 0

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