[sf-lug] resolver problem

[Daniel Gimpelevich]

On Wed, 2016-04-06 at 12:29 -0700, Alex Kleider wrote:
> On 2016-04-06 10:23, Daniel Gimpelevich wrote:
> > On Wed, 2016-04-06 at 09:44 -0700, Alex Kleider wrote:
> >> 172.31.2.0      172.31.2.13     255.255.255.0   UG    0      0
> >> 0
> >> tun0
> >> 172.31.2.13     *               255.255.255.255 UH    0      0
> >> 0
> >> tun0
> > 
> > This is interesting, but not necessarily related. Any idea what it
> is?
> 
> I'm surprised you feel it's unrelated.
> 172.16.0.0-172.31.255.255 ip range is a private one (Class II,
> perhaps) 
> but I've never used it with this machine.  All my home networks are 
> using 10.0.0.0/24 for the lan side so I don't know where Ubuntu could 
> have picked up 172.31
> ...but since it did, would not all routing fail?  ... and if so, how 
> come some things still work?
> 
> Again, thank you for your suggestions.
> 
> Alex

It's on the tun0 interface, so it's most likely some sort of VPN.
Another possible use of tun0 is for virtual machines.