这种方法无需重启:

[root@ha02 ~]# cat /proc/sys/net/ipv4/ip_forward0[root@ha02 ~]# sysctl -w net.ipv4.ip_forward=1net.ipv4.ip_forward = 1[root@ha02 ~]# cat /proc/sys/net/ipv4/ip_forward1

[root@ha02 ~]# sysctl -p /etc/sysctl.conf

net.ipv4.ip_forward = 0

net.ipv4.conf.default.rp_filter = 1

net.ipv4.conf.default.accept_source_route = 0

kernel.sysrq = 0

kernel.core_uses_pid = 1

net.ipv4.tcp_syncookies = 1

kernel.msgmnb = 65536

kernel.msgmax = 65536

kernel.shmmax = 68719476736

kernel.shmall = 4294967296