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Old 04-14-2018, 02:13 PM   #1
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Registered: Jun 2013
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Cloning Ubuntu VM - Odd networking behavior

In an effort to reduce a rather complicated setup on my ubuntu 16.04 desktop vm's on vCenter 6.5, I've been presented with a rather odd situation after the networking is all put back together again. It was\is easier this way, however...

Network Schema> lab network - nothing fancy. The original (O1) was cloned to two other vm's: (C1) and C2). There's another test vm sitting on the network as (Win10), which is a Win10 box.

On the Lab Network:

From Win10, I can get to any of the vm's via ping, winscp, etc.

From O1, C1, C2, I can ssh, ping, etc to any of these three (the original or the two clones).

On a VPN network from home:

From home on my laptop, I can ping, ssh/putty, winscp to only O1 - the original ubuntu box. (The Win10 box doesn't count in this problem other than to show that winscp works but only from a box on the lab network).

From home on my laptop, I cannot ping the clones nor can I winscp in to them. But I can putty/ssh in to any of them. I'm completely at a loss for this, and asking if anyone knows how/why this is happening? I'm missing something, but can't figure out what that is... all the clones have naturally been rebooted, and everything works find inside the lab network. It's not a vpn issue that I know of as I can do all my previous actions to the original ubuntu, just not the clones.

I've accounted for the changing mac's and the ssh certificates, otherwise nothing would be working in the lab. I'm thinking something got stuck. No firewalls are running on these beasties either (ok, actually they show as inactive, but my point is they're still not blocking any traffic).

Anyone have any ideas? Many thanks if so!
Old 04-14-2018, 02:54 PM   #2
Registered: Mar 2008
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The difference seems to be from vpn. We'd need to know more about it. Is this a vpn device?
Old 04-15-2018, 06:55 AM   #3
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Registered: Jun 2013
Posts: 6

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Jefro - I'm not sure how the vpn could be the culprit as the original ubuntu vm was, and still is, fully functional from a vpn connection. And I 'can' ssh in to the clones from the vpn, even though I can't ping (yes, I know it could be turned off but it isn't as I can ping the original vm. This is maddening!


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