[root@hanfeng ~]# cat /proc/sys/net/ipv4/ip_forward
0
[root@hanfeng ~]#
[root@hanfeng ~]# echo "1" > !$
echo "1" > /proc/sys/net/ipv4/ip_forward
[root@hanfeng ~]# !cat
cat /proc/sys/net/ipv4/ip_forward
1
[root@hanfeng ~]#
[root@hanfeng ~]# iptables -t nat -A POSTROUTING -s 192.168.100.0/24 -o ens33 -j MASQUERADE
[root@hanfeng ~]#