root@yanhc-Aspire-4738G:/home/yanhc# cat /proc/sys/net/ipv4/ip_forward 0 root@yanhc-Aspire-4738G:/home/yanhc# cat /proc/sys/net/ipv6/ip_forward cat: /proc/sys/net/ipv6/ip_forward: 没有那个文件或目录 root@yanhc-Aspire-4738G:/home/yanhc# cat /proc/sys/net/ipv6/conf/all/forwarding 0 root@yanhc-Aspire-4738G:/home/yanhc# sysctl -w net.ipv6.conf.all.forwarding=1 net.ipv6.conf.all.forwarding = 1 root@yanhc-Aspire-4738G:/home/yanhc# cat /proc/sys/net/ipv6/conf/all/forwarding 1