[colug-432] Issues with Routing under KVM / OpenVPN

[Brian]

I am not a network expert, but I can tell you that a 192.168.6.xx address
will never be an a 192.168.4.0/255.255.255.0 network.  So the gateway you
have setup isn't legal and/or workable.

On May 17, 2017 8:01 PM, "Joshua Kramer" <joskra42.list at gmail.com> wrote:

> Here's the network setup:
> 1. A virtual network named 'locservers' with the range 192.168.4.0/24
> and the device virbr2
> 2. Under Network Interfaces, the device virbr2 has the address
> 192.168.4.1 (this is the KVM host)
> 3. On the virbr2 network interface, there are a number of slave
> interfaces.  One of those slave interfaces is vnet1, and its MAC
> address corresponds to eth0 MAC address on the VPN server.
>
> On Tue, May 16, 2017 at 9:13 PM, Zach Villers <zachvatwork at gmail.com>
> wrote:
> > Hi Joshua,
> >
> > I read through a couple of times, but didn't see how the KVM network
> > adapters were configured?
> >
> > --
> >   Zach Villers
> >   zach at znix.site
> >
> > On Tue, May 16, 2017, at 09:11 PM, Zach Villers wrote:
> >> Hi Joshua,
> >>
> >> I read through a couple of times, but didn't see how the KVM network
> >> adapters were configured?
> >>
> >> --
> >>   Zach Villers
> >>   zach at znix.site
> >>
> >> On Tue, May 16, 2017, at 08:11 PM, Joshua Kramer wrote:
> >> > Hello,
> >> >
> >> > I'm trying to figure out a routing issue involving a set of servers I
> >> > have under KVM as well as OpenVPN.
> >> >
> >> > The servers are under a private network, 192.168.4.0/24 ... there are
> >> > no physical interfaces on the .4 network- it's all internal to KVM.
> >> >
> >> > I would like to have devices on the internet (i.e. my phone) be able
> >> > to access the servers I have on the .4 network.  So, I have one
> >> > OpenVPN VM on the .4 network.  My modem/router will forward inbound
> >> > connections for the OVPN port to this VM.
> >> >
> >> > I set up OVPN in routing mode.  I gave the external devices a *.6/24
> >> > network.  The tun0 interface set up via OVPN has an address of
> >> > 192.168.6.1.  I connect to the OVPN server from outside of the network
> >> > using my cell phone over the cellular connection.  The OVPN client on
> >> > the phone gives it an address of 192.168.6.2.
> >> >
> >> > The underlying hardware host has the address 192.168.4.1.  The OVPN
> >> > server is on  192.168.4.34. I set up the routing on the hardware like
> >> > this:
> >> >
> >> > route add -net 192.168.6.0 netmask 255.255.255.0 gw 192.168.4.34
> >> >
> >> > Something is not working with that route.  If I get on another VM that
> >> > is on the .4 network and do a traceroute to 192.168.6.1, I get the
> >> > following.  It should show a hop to 192.168.4.34 but it does not.
> >> >
> >> > traceroute to 192.168.6.1 (192.168.6.1), 30 hops max, 60 byte packets
> >> >  1  192.168.4.1 (192.168.4.1)  0.162 ms  0.080 ms  0.076 ms
> >> >  2  192.168.6.1 (192.168.6.1)  0.499 ms !X  0.223 ms !X  0.134 ms !X
> >> >
> >> > What am I missing?  The hardware host is misconfigured in some way and
> >> > I am having difficulty determining where.  CentOS 7 runs on all hosts
> >> > and VM's.
> >> >
> >> > Thanks!
> >> > -JK
> >> > _______________________________________________
> >> > colug-432 mailing list
> >> > colug-432 at colug.net
> >> > http://lists.colug.net/mailman/listinfo/colug-432
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