[Openstack-operators] [neutron] Interesting networking issue - need help

Neil Jerram Neil.Jerram at metaswitch.com
Thu Mar 31 17:51:56 UTC 2016


On 31/03/16 18:40, Christopher Hull wrote:
> Hi all;
> Was originally DNS issue, but that was a downstream symptom.
>
> Instances on Private net can't access internet TCP, but CAN ICMP. ping all.
> Details:
> 1. Instances on Public net work perfectly.
> 2. Instances on Private net can fully access Public net instances, both
> virtual and physical boxes.
>     ssh from Private to Public instance works.
>     http to OpenStack dashboard (physical box) from Private instance works.
> 3. Private instances can ping everything, including the internet.

By IP or by hostname?

> 4. Private instances can NOT TCP to my ATT gateway. (public net)
>     HTTP to ATT gateway which has a web interface fails.
>     Same is true for internet.  Ping, but no TCP (UDP?)

Again, are these TCP attempts to an IP or to a hostname?

Just want to be sure that this isn't still a name resolution issue.

	Neil


> 5. Floating IPs work.   I think the Neutron Router is fine.
>
> Any ideas??
> -Chris
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> - Christopher T. Hull
> I am presently seeking a new career opportunity  Please see career page
> http://chrishull.com/career
> 333 Orchard Ave, Sunnyvale CA. 94085
> (415) 385 4865
> chrishull42 at gmail.com <mailto:chrishull42 at gmail.com>
> http://chrishull.com
>
>




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