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Can't ssh/ping my Windows instance

I am setting up an all-in-one (single node) OpenStack compute cloud and I am new to this. I set my network as FlatDHCPManager mode and the first ubuntu instance is up and running well. (I follow the instructions through here http://wiki.openstack.org/GettingImages) When I try to create a Windows instance, the Windows XP instance could be up and running fine. But I can't ssh/ping to the instance at all. I follow the document listed here http://docs.openstack.org/cactus/openstack-compute/admin/content/creating-a-windows-image.html to create a Windows image. And I can vncview connect to the Windows XP and set up the applications & turn on the RDP ok. Just that I could not ssh/ping to the instance after I use euca-run-instance to boot the Windows instance. Is there any step I missed or the network setting was incorrect? Is there anyone who can give me some directions? Here is the nova configuration:

--dhcpbridge_flagfile=/etc/nova/nova.conf --dhcpbridge=/usr/bin/nova-dhcpbridge --logdir=/var/log/nova --state_path=/var/lib/nova --lock_path=/var/lock/nova --verbose --s3_host=172.18.2.238 --rabbit_host=192.168.0.1 --cc_host=192.168.0.1 --ec2_url=http://172.18.2.238:8773/services/Cloud --FAKE_subdomain=ec2 --routing_source_ip=192.168.0.1 --sql_connection=mysql://root:111111@172.18.2.238/nova --glance_host=192.168.0.1 --image_service=nova.image.glance.GlanceImageService --flat_interface=eth1 --network_manager=nova.network.manager.FlatDHCPManager --flat_network_dhcp_start=192.168.0.2 --flat_injected=False --iscsi_ip_prefix=192.168.0 --use_ipv6=false

euca-describe-instances

RESERVATION r-v0j55ny4 mycloud default INSTANCE i-00000002 ami-00000002 172.18.2.229 192.168.0.3 running key (mycloud, openstack) 0 m1.small 2011-07-22T06:51:00Z nova RESERVATION r-trm3r969 mycloud default INSTANCE i-00000009 ami-00000004 192.168.0.2 192.168.0.2 running key (mycloud, openstack) 0 m1.small 2011-08-08T08:17:16Z nova

Among the above instances, the instance 2 could be connected alright. But not the instance 9.

And my dnsmasq processes are up and running: nobody 1334 1 0 14:34 ? 00:00:00 dnsmasq --strict-order --bind-interfaces --pid-file=/var/run/libvirt/network/default.pid --conf-file= --except-interface lo --listen-address 192.168.122.1 --dhcp-range 192.168.122.2,192.168.122.254 --dhcp-lease-max=253 --dhcp-no-override nobody 2156 1 0 14:34 ? 00:00:00 dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100.pid --listen-address=192.168.0.1 --except-interface=lo --dhcp-range=192.168.0.2,static,120s --dhcp-hostsfile=/var/lib/nova/networks/nova-br100.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro root 2157 2156 0 14:34 ? 00:00:00 dnsmasq --strict-order --bind-interfaces --conf-file= --domain=novalocal --pid-file=/var/lib/nova/networks/nova-br100.pid --listen-address=192.168.0.1 --except-interface=lo --dhcp-range=192.168.0.2,static,120s --dhcp-hostsfile=/var/lib/nova/networks/nova-br100.conf --dhcp-script=/usr/bin/nova-dhcpbridge --leasefile-ro root 6408 5117 0 17:11 pts/2 00:00:00 grep --color=auto dns

Here is the # ifconfig br100 Link encap:Ethernet HWaddr 00:15:17:8a:7e:9c inet addr:192.168.0.1 Bcast:192.168.255.255 Mask:255.255.0.0 inet6 addr: fe80::215:17ff:fe8a:7e9c/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:615 errors:0 dropped:0 overruns:0 frame:0 TX packets:924 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:90532 (90.5 KB) TX bytes:137559 (137.5 KB)

eth0 Link encap:Ethernet HWaddr 00:22:19:06:41:7f inet addr:172.18.2.238 Bcast:172.18.3.255 Mask:255.255.252.0 inet6 addr: fe80::222:19ff:fe06:417f/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:5787816 errors:0 dropped:948 overruns:0 frame:0 TX packets:2995721 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4747451857 (4.7 GB) TX bytes:212518968 (212.5 MB) Interrupt:16 Memory:f8000000-f8012800

eth1 Link encap:Ethernet HWaddr 00:15:17:8a:7e:9c UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:18 Memory:fc5e0000-fc600000

eth2 Link encap:Ethernet HWaddr 00:15:17:8a:7e:9d UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:19 Memory:fc5a0000-fc5c0000

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:3473150 errors:0 dropped:0 overruns:0 frame:0 TX packets:3473150 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:288835207 (288.8 MB) TX bytes:288835207 (288.8 MB)

virbr0 Link encap:Ethernet HWaddr 86:8b:32:41:00:f7 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:98 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:7738 (7.7 KB)

vnet0 Link encap:Ethernet HWaddr fe:16:3e:66:5f:27 inet6 addr: fe80::fc16:3eff:fe66:5f27/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:692 errors:0 dropped:0 overruns:0 frame:0 TX packets:795 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:105772 (105.7 KB) TX bytes:125100 (125.1 KB)

vnet1 Link encap:Ethernet HWaddr fe:16:3e:44:fc:24 inet6 addr: fe80::fc16:3eff:fe44:fc24/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:90 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:8860 (8.8 KB)

And the firewalll settings are listed

iptables -L

Chain INPUT (policy ACCEPT) target prot opt source destination nova-compute-INPUT all -- anywhere anywhere nova-network-INPUT all -- anywhere anywhere ACCEPT udp -- anywhere anywhere udp dpt:domain ACCEPT tcp -- anywhere anywhere tcp dpt:domain ACCEPT udp -- anywhere anywhere udp dpt:bootps ACCEPT tcp -- anywhere anywhere tcp dpt:bootps

Chain FORWARD (policy ACCEPT) target prot opt source destination nova-filter-top all -- anywhere anywhere nova-compute-FORWARD all -- anywhere anywhere nova-network-FORWARD all -- anywhere anywhere ACCEPT all -- anywhere 192.168.122.0/24 state RELATED,ESTABLISHED ACCEPT all -- 192.168.122.0/24 anywhere ACCEPT all -- anywhere anywhere REJECT all -- anywhere anywhere reject-with icmp-port-unreachable REJECT all -- anywhere anywhere reject-with icmp-port-unreachable

Chain OUTPUT (policy ACCEPT) target prot opt source destination nova-filter-top all -- anywhere anywhere nova-compute-OUTPUT all -- anywhere anywhere nova-network-OUTPUT all -- anywhere anywhere

Chain nova-compute-FORWARD (1 references) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere

Chain nova-compute-INPUT (1 references) target prot opt source destination

Chain nova-compute-OUTPUT (1 references) target prot opt source destination

Chain nova-compute-inst-2 (1 references) target prot opt source destination DROP all -- anywhere anywhere state INVALID ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT udp -- openstackYH1.local anywhere udp spt:bootps dpt:bootpc ACCEPT all -- 192.168.0.0/25 anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT icmp -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:3389 nova-compute-sg-fallback all -- anywhere anywhere

Chain nova-compute-inst-9 (1 references) target prot opt source destination DROP all -- anywhere anywhere state INVALID ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT udp -- openstackYH1.local anywhere udp spt:bootps dpt:bootpc ACCEPT all -- 192.168.0.0/25 anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:ssh ACCEPT icmp -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:3389 nova-compute-sg-fallback all -- anywhere anywhere

Chain nova-compute-local (1 references) target prot opt source destination nova-compute-inst-9 all -- anywhere 192.168.0.2 nova-compute-inst-2 all -- anywhere 192.168.0.3

Chain nova-compute-sg-fallback (2 references) target prot opt source destination DROP all -- anywhere anywhere

Chain nova-filter-top (2 references) target prot opt source destination nova-compute-local all -- anywhere anywhere nova-network-local all -- anywhere anywhere

Chain nova-network-FORWARD (1 references) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere

Chain nova-network-INPUT (1 references) target prot opt source destination

Chain nova-network-OUTPUT (1 references) target prot opt source destination

Chain nova-network-local (1 references) target prot opt source destination