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From "谢福平" <754282...@qq.com>
Subject 主机防火墙导致虚拟机不通
Date Thu, 15 May 2014 01:42:18 GMT
操作步骤
 1.虚拟机正常,能ping通
 2.新建虚拟机,如果虚拟机的宿主机为A
 3.主机A上的原有虚拟机ping不通,新建的虚拟机正常
 4.关闭主机防火墙,A上所有虚拟机都能ping通
 5.过一段时间,A上防火墙自动起来,所有虚拟机也能正常ping通
  
 总结就是,只有新建虚拟机时,新虚拟机所在主机上的原虚拟机会ping不通,新建的虚拟机正常。
 查看主机上的防火墙状态如下:
 [root@iad-kvm-1 ~]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
 Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination         
1    BF-br-guest  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-is-bridged

2    BF-br-guest  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-is-bridged

3    DROP       all  --  0.0.0.0/0            0.0.0.0/0           
4    DROP       all  --  0.0.0.0/0            0.0.0.0/0           
 Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination         
 Chain BF-br-guest (2 references)
num  target     prot opt source               destination         
1    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED

2    BF-br-guest-IN  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-is-in
--physdev-is-bridged 
3    BF-br-guest-OUT  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-is-out
--physdev-is-bridged 
4    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-out
eth1 --physdev-is-bridged 
 Chain BF-br-guest-IN (1 references)
num  target     prot opt source               destination         
1    i-2-505-def  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-in
vnet6 --physdev-is-bridged 
 Chain BF-br-guest-OUT (1 references)
num  target     prot opt source               destination         
1    i-2-505-def  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-out
vnet6 --physdev-is-bridged 
 Chain i-2-505-VM (1 references)
num  target     prot opt source               destination         
1    ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpts:1:65535 state NEW

2    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpts:1:65535 state NEW

3    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           icmp type 255 
4    DROP       all  --  0.0.0.0/0            0.0.0.0/0           
 Chain i-2-505-VM-eg (1 references)
num  target     prot opt source               destination         
1    RETURN     udp  --  0.0.0.0/0            0.0.0.0/0           udp dpts:1:65535 state NEW

2    RETURN     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpts:1:65535 state NEW

3    RETURN     icmp --  0.0.0.0/0            0.0.0.0/0           icmp type 255 
4    DROP       all  --  0.0.0.0/0            0.0.0.0/0           
 Chain i-2-505-def (2 references)
num  target     prot opt source               destination         
1    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED

2    ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-in
vnet6 --physdev-is-bridged udp spt:68 dpt:67 
3    ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-out
vnet6 --physdev-is-bridged udp spt:67 dpt:68 
4    RETURN     udp  --  10.5.26.96           0.0.0.0/0           PHYSDEV match --physdev-in
vnet6 --physdev-is-bridged udp dpt:53 
5    i-2-505-VM-eg  all  --  10.5.26.96           0.0.0.0/0           PHYSDEV match --physdev-in
vnet6 --physdev-is-bridged 
6    i-2-505-VM  all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV match --physdev-out
vnet6 --physdev-is-bridged
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