这个openvz盒子在几个星期前就正常工作了，现在它不能ping通外面的世界。
我不是networking专家，我认为最初的工作设置将会持续更长的时间。
另一个问题是这个虚拟机的Web服务可以从外部使用。
Pingnetworking接口：
vz:/# ping 88.191.118.xxx PING 88.191.118.xxx (88.191.118.xxx) 56(84) bytes of data. 64 bytes from 88.191.118.xxx: icmp_req=1 ttl=64 time=0.048 ms 64 bytes from 88.191.118.xxx: icmp_req=2 ttl=64 time=0.043 ms --- 88.191.118.xxx ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 999ms rtt min/avg/max/mdev = 0.043/0.045/0.048/0.007 ms Ping谷歌：
vz:/# ping 74.125.230.83 PING 74.125.230.83 (74.125.230.83) 56(84) bytes of data. --- 74.125.230.83 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3023ms
使用ifconfig：
vz:/# ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:59 errors:0 dropped:0 overruns:0 frame:0 TX packets:59 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:5507 (5.3 KiB) TX bytes:5507 (5.3 KiB) venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:127.0.0.1 PtP:127.0.0.1 Bcast:0.0.0.0 Mask:255.255.255.255 UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1 RX packets:89 errors:0 dropped:0 overruns:0 frame:0 TX packets:584 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:20938 (20.4 KiB) TX bytes:395767 (386.4 KiB) venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:192.168.23.101 PtP:192.168.23.101 Bcast:0.0.0.0 Mask:255.255.255.255 UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
路线：
vz:/# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.0.2.1 0.0.0.0 255.255.255.255 UH 0 0 0 venet0 0.0.0.0 192.0.2.1 0.0.0.0 UG 0 0 0 venet0
主机上的iptable：
iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination fail2ban-ssh tcp -- anywhere anywhere multiport dports ssh Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain fail2ban-ssh (1 references) target prot opt source destination RETURN all -- anywhere anywhere
解决：2个星期前，这个盒子重新启动，iptables脚本没有启动。
当前的firewall.sh脚本：
sd-20628:~# more firewall.sh #!/bin/bash IPTABLES='/sbin/iptables'; VZ101_WEB="192.168.23.101"; LAN="192.168.23.0/24"; WAN_IFACE="eth0"; WAN_IP="88.191.xxx.xxx"; # Flushing tables $IPTABLES -F $IPTABLES -X $IPTABLES -t nat -F # Define default policy $IPTABLES -P INPUT DROP $IPTABLES -P OUTPUT ACCEPT $IPTABLES -P FORWARD ACCEPT $IPTABLES -A INPUT -j ACCEPT -d $LAN; $IPTABLES -A INPUT -j ACCEPT -m state --state ESTABLISHED,RELATED $IPTABLES -A INPUT -j ACCEPT -p tcp --dport 22 $IPTABLES -A INPUT -j ACCEPT -p tcp --dport 80 $IPTABLES -A INPUT -j ACCEPT -p tcp --dport 9102 $IPTABLES -A INPUT -j ACCEPT -p icmp # SSH in VZ access $IPTABLES -t nat -A PREROUTING -p tcp --dport 22101 -d $WAN_IP -j DNAT --to-destination $VZ101_WEB:22