arp 实现静态MAC绑定 iptables -A FORWARD -s 218.28.132.38 -j DROP
[root@autocnc ~]# ip route
219.147.xx.xx/29 dev eth1 proto kernel scope link src 219.147.xx.xx
218.28.xx.xx/29 dev eth2 proto kernel scope link src 218.28.xx.xx
192.168.0.0/22 dev eth0 proto kernel scope link src 192.168.0.1
169.254.0.0/16 dev eth2 scope link
default via 218.28.xx.xx dev eth2
[root@autocnc ~]# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
219.147.xx.xx * 255.255.255.248 U 0 0 0 eth1
218.28.xx.xx * 255.255.255.248 U 0 0 0 eth2
192.168.0.0 * 255.255.252.0 U 0 0 0 eth0
169.254.0.0 * 255.255.0.0 U 0 0 0 eth2
default pc0.zz.ha.cn 0.0.0.0 UG 0 0 0 eth2
[root@autocnc ~]# arp -i eth2
Address HWtype HWaddress Flags Mask Iface
pc0.zz.ha.cn ether 000:04:02:10:0A CM eth2

pc0.zz.ha.cn ether 00:06:29:CF:F4:3C C eth2
还是有两个 内网用户在访问外网时还是不正常应该只有一个