[kwlug-disc] Problem reaching server

[Jeff Smith]

I am unable to connect, or even ping, the physical server, however I am
able to fully connect to the virtual machines inside that physical
server.  The fact that the VMs are talking fine makes me think that the
two NIC cards on the physical box are not the problem.  I can't hit the
internet, or even the local network, from the physical box (thus I can't
even check for updates online).

The VMs can't ping their physical host, either.

OwnCloud is running on the physical box (as a service on that box) and
so I am unable to connect to ownCloud either.




On 15-03-15 12:11 AM, B.S. wrote:
>> This is getting interesting, to say the least.  I can hit those VMs
>> with no problems, but my ownCloud install is inaccessible (as well as
>> the
>> server itself).
>
> Help us out ... this is from outside your premises to within?
>
> Your OwnCloud is a box within your premises or a vm or?
>
> If you can hit a vm (via ssh, say), are you then able to get to the
> server? e.g. Does it ping, even if it won't give you an ssh prompt?
>
> If it gives you an ssh prompt from the vm, then you have a routing or
> permissions (e.g. firewall) issue. If it won't even ping then you have
> a hardware or software ethernet issue, and the only way you're going
> to get useful information to figure this out is from the server
> itself. 'ifconfig', 'route', and 'iptables -L' will be useful
> information to be able to help. If nothing can get in, that server's
> state or perception of the world is the only thing that will help.
> Given that you can get through the server, it's not likely a hardware
> issue.
>
> Given that this was working for you, likely a bug was introduced.
> Which is to say, a followup update may resolve the issue, and any
> corrective action you do now to fix things may have to be reversed
> upon software update.
>
> Going forwards, consider establishing a reverse ssh tunnel from the
> server to a vm or other internal machine. I've seen where current
> connections stay stable, it's only new connections that are prevented.
> Then, at need, you could reverse ssh in from that endpoint to see
> what's going on / fix - if only to trigger a reboot. (And a reboot may
> be a nasty thing - essentially summarily yanking the power from any
> vm's, etc.)
>
>
> On 03/14/2015 11:41 AM, CrankyOldBugger wrote:
>> Well, commenting out the "auto br0" portion of interfaces didn't make
>> any difference.. Nice try, though.
>>
>> This is getting interesting, to say the least.  I can hit those VMs
>> with no problems, but my ownCloud install is inaccessible (as well as
>> the server itself).
>>
>>
>> On Sat, 14 Mar 2015 at 00:09 B.S. <bs27975 at yahoo.ca> wrote:
>>
>>> I have also been experiencing disappearing connectivity since early
>>> this year with a remote K/Ubuntu 14.04. eth0 appear up and happy
>>> per ifconfig, but nothing pings.
>
>
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