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Message #21537
Re: VM guest can't access outside world.
Hi, Barrow Kwan.
I have the same problem in ubuntu.
On Tue, Mar 5, 2013 at 3:37 AM, Barrow Kwan <barrowkwan@xxxxxxxxx> wrote:
> Hi,
> Thanks Jeff. this is what I got from tcpdump. The target (10.38.1.2 )
> didn't
> seem to reply. might be the target ( 10.38.1.2 ) didn't know how to route
> the
>
> packet to 192.168.151.3? could that be SNAT issue? or like you said it
> needs IP
> masquerading rule. might be a bug in Quantum?
>
>
> Barrow
>
>
>
>
> tcpdump: WARNING: em1: no IPv4 address assigned
> tcpdump: listening on em1, link-type EN10MB (Ethernet), capture size 65535
> bytes
> 11:31:02.825150 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto
> ICMP (1),
>
> length 84)
> 192.168.151.3 > 10.38.1.2: ICMP echo request, id 11910, seq 133,
> length 64
> 11:31:03.825338 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto
> ICMP (1),
>
> length 84)
> 192.168.151.3 > 10.38.1.2: ICMP echo request, id 11910, seq 134,
> length 64
> 2 packets captured
> 3 packets received by filter
> 0 packets dropped by kernel
>
>
>
>
> ----- Original Message ----
> From: Jeff Peeler <jpeeler@xxxxxxxxxx>
> To: openstack@xxxxxxxxxxxxxxxxxxx
> Sent: Mon, March 4, 2013 7:39:03 AM
> Subject: Re: [Openstack] VM guest can't access outside world.
>
> On Wed, Feb 27, 2013 at 12:38:45PM -0800, Barrow Kwan wrote:
> > [root@optst01 quantum]# service iptables status
> > Table: nat
> > Chain PREROUTING (policy ACCEPT)
> > num target prot opt source destination
> > 1 nova-compute-PREROUTING all -- 0.0.0.0/0 0.0.0.0/0
>
>
> > 2 quantum-l3-agent-PREROUTING all -- 0.0.0.0/0
> 0.0.0.0/0
>
>
> >
> > 3 nova-api-PREROUTING all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain POSTROUTING (policy ACCEPT)
> > num target prot opt source destination
> > 1 nova-compute-POSTROUTING all -- 0.0.0.0/0 0.0.0.0/0
> >
> > 2 quantum-l3-agent-POSTROUTING all -- 0.0.0.0/0
> 0.0.0.0/0
> >
> >
> >
> > 3 quantum-postrouting-bottom all -- 0.0.0.0/0 0.0.0.0/0
> >
> >
> >
> > 4 nova-api-POSTROUTING all -- 0.0.0.0/0 0.0.0.0/0
> > 5 nova-postrouting-bottom all -- 0.0.0.0/0 0.0.0.0/0
>
>
> >
> > Chain OUTPUT (policy ACCEPT)
> > num target prot opt source destination
> > 1 nova-compute-OUTPUT all -- 0.0.0.0/0 0.0.0.0/0
> > 2 quantum-l3-agent-OUTPUT all -- 0.0.0.0/0 0.0.0.0/0
>
>
> > 3 nova-api-OUTPUT all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain nova-api-OUTPUT (1 references)
> > num target prot opt source destination
> >
> > Chain nova-api-POSTROUTING (1 references)
> > num target prot opt source destination
> >
> > Chain nova-api-PREROUTING (1 references)
> > num target prot opt source destination
> >
> > Chain nova-api-float-snat (1 references)
> > num target prot opt source destination
> >
> > Chain nova-api-snat (1 references)
> > num target prot opt source destination
> > 1 nova-api-float-snat all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain nova-compute-OUTPUT (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-POSTROUTING (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-PREROUTING (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-float-snat (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-snat (1 references)
> > num target prot opt source destination
> > 1 nova-compute-float-snat all -- 0.0.0.0/0 0.0.0.0/0
>
>
> >
> > Chain nova-postrouting-bottom (1 references)
> > num target prot opt source destination
> > 1 nova-compute-snat all -- 0.0.0.0/0 0.0.0.0/0
> > 2 nova-api-snat all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain quantum-l3-agent-OUTPUT (1 references)
> > num target prot opt source destination
> >
> > Chain quantum-l3-agent-POSTROUTING (1 references)
> > num target prot opt source destination
> > 1 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 !
> ctstate
> > DNAT
> >
> > Chain quantum-l3-agent-PREROUTING (1 references)
> > num target prot opt source destination
> >
> > Chain quantum-l3-agent-float-snat (1 references)
> > num target prot opt source destination
> >
> > Chain quantum-l3-agent-snat (1 references)
> > num target prot opt source destination
> > 1 quantum-l3-agent-float-snat all -- 0.0.0.0/0
> 0.0.0.0/0
>
>
> >
> > 2 SNAT all -- 192.168.151.0/24 0.0.0.0/0
> to:10.38.17.1
> >
> >
> >
> > Chain quantum-postrouting-bottom (1 references)
> > num target prot opt source destination
> > 1 quantum-l3-agent-snat all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Table: filter
> > Chain INPUT (policy ACCEPT)
> > num target prot opt source destination
> > 1 nova-compute-INPUT all -- 0.0.0.0/0 0.0.0.0/0
> > 2 quantum-l3-agent-INPUT all -- 0.0.0.0/0 0.0.0.0/0
> > 3 nova-api-INPUT all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain FORWARD (policy ACCEPT)
> > num target prot opt source destination
> > 1 nova-filter-top all -- 0.0.0.0/0 0.0.0.0/0
> > 2 nova-compute-FORWARD all -- 0.0.0.0/0 0.0.0.0/0
> > 3 quantum-filter-top all -- 0.0.0.0/0 0.0.0.0/0
> > 4 quantum-l3-agent-FORWARD all -- 0.0.0.0/0 0.0.0.0/0
> >
> > 5 nova-api-FORWARD all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain OUTPUT (policy ACCEPT)
> > num target prot opt source destination
> > 1 nova-filter-top all -- 0.0.0.0/0 0.0.0.0/0
> > 2 nova-compute-OUTPUT all -- 0.0.0.0/0 0.0.0.0/0
> > 3 quantum-filter-top all -- 0.0.0.0/0 0.0.0.0/0
> > 4 quantum-l3-agent-OUTPUT all -- 0.0.0.0/0 0.0.0.0/0
>
>
> > 5 nova-api-OUTPUT all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain nova-api-FORWARD (1 references)
> > num target prot opt source destination
> >
> > Chain nova-api-INPUT (1 references)
> > num target prot opt source destination
> > 1 ACCEPT tcp -- 0.0.0.0/0 10.38.15.251 tcp
> dpt:8775
>
>
> >
> > Chain nova-api-OUTPUT (1 references)
> > num target prot opt source destination
> >
> > Chain nova-api-local (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-FORWARD (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-INPUT (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-OUTPUT (1 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-inst-20 (1 references)
> > num target prot opt source destination
> > 1 DROP all -- 0.0.0.0/0 0.0.0.0/0 state
> INVALID
> >
> >
> > 2 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state
> > RELATED,ESTABLISHED
> > 3 nova-compute-provider all -- 0.0.0.0/0 0.0.0.0/0
> > 4 ACCEPT udp -- 192.168.151.2 0.0.0.0/0 udp
> spt:67
> > dpt:68
> > 5 ACCEPT all -- 192.168.151.0/24 0.0.0.0/0
> > 6 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
> > 7 ACCEPT icmp -- 192.168.151.3 0.0.0.0/0
> > 8 ACCEPT icmp -- 192.168.151.4 0.0.0.0/0
> > 9 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp
> dpt:22
> > 10 nova-compute-sg-fallback all -- 0.0.0.0/0 0.0.0.0/0
> >
> >
> > Chain nova-compute-inst-21 (1 references)
> > num target prot opt source destination
> > 1 DROP all -- 0.0.0.0/0 0.0.0.0/0 state
> INVALID
> >
> >
> > 2 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state
> > RELATED,ESTABLISHED
> > 3 nova-compute-provider all -- 0.0.0.0/0 0.0.0.0/0
> > 4 ACCEPT udp -- 192.168.151.2 0.0.0.0/0 udp
> spt:67
> > dpt:68
> > 5 ACCEPT all -- 192.168.151.0/24 0.0.0.0/0
> > 6 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
> > 7 ACCEPT icmp -- 192.168.151.3 0.0.0.0/0
> > 8 ACCEPT icmp -- 192.168.151.4 0.0.0.0/0
> > 9 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp
> dpt:22
> > 10 nova-compute-sg-fallback all -- 0.0.0.0/0 0.0.0.0/0
> >
> >
> > Chain nova-compute-local (1 references)
> > num target prot opt source destination
> > 1 nova-compute-inst-20 all -- 0.0.0.0/0 192.168.151.3
> > 2 nova-compute-inst-21 all -- 0.0.0.0/0 192.168.151.4
> >
> > Chain nova-compute-provider (2 references)
> > num target prot opt source destination
> >
> > Chain nova-compute-sg-fallback (2 references)
> > num target prot opt source destination
> > 1 DROP all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain nova-filter-top (2 references)
> > num target prot opt source destination
> > 1 nova-compute-local all -- 0.0.0.0/0 0.0.0.0/0
> > 2 nova-api-local all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain quantum-filter-top (2 references)
> > num target prot opt source destination
> > 1 quantum-l3-agent-local all -- 0.0.0.0/0 0.0.0.0/0
> >
> > Chain quantum-l3-agent-FORWARD (1 references)
> > num target prot opt source destination
> >
> > Chain quantum-l3-agent-INPUT (1 references)
> > num target prot opt source destination
> >
> > Chain quantum-l3-agent-OUTPUT (1 references)
> > num target prot opt source destination
> >
> > Chain quantum-l3-agent-local (1 references)
> > num target prot opt source destination
>
> Have you tried running tcpdump on the public interface to see how far
> the packets are getting? Maybe something like: tcpdump -n -c2 icmp -i em1,
> then try pinging from the VM. It could be that you're attempting to send
> unroutable packets, in which case an IP masquerading rule needs adding.
>
> Jeff
>
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