CentOS Networking with V Box

[Michael Torres]

OK, here is my ifconfig -a result...Typed out  :) ....

enp0s3: flags=4163<UP, BROADCAST, RUNNING, MULTICAST> mtu 1500
            inet6 {the IP6 address} prefixlen 64 scopeid 0x20<link>
            ether 08:00:27:ff:a0:ac txqueuelen 1000 (Ethernet)
            RX packets 2  bytes 120 (120.0 B)
            RX errors 0  dropped 0 overruns 0 frame 0
            TX packets 14 bytes 1860 (1.8 KiB)
            TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP, LOOPBACK, RUNNING> mtu 65536
            inet 127.0.0.1 netmask 255.0.0.0
            inet6 ::1 prefixlen 128 scopeid 0x10<host>
            loop txqueuelen 0 (Local Loopback)
            RX packets 0  bytes 0 (0.0 B)
            RX errors 0  dropped 0 overruns 0 frame 0
            TX packets 14 bytes 1860 (0.0 B)
            TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0


I consistently run the command every time I make a change that I think may
work, this is the typical result that occurs.

Mike





On Tue, Feb 3, 2015 at 11:14 PM, Michael Butash <michael at butash.net> wrote:

>  Sounds like you're binding to the wrong interface for your bridge for
> vbox.  You shouldn't need to put it in promiscuous unless you're intending
> to sniff actually with wireshark or like.
>
> As asked, ifconfig -a would be helpful.
>
> What is your "outside" interface you're bridging to?  Where does the
> "host" get it's address from?
>
> Make sure vbox is binding to "that" interface.
>
> I've not ever had an issue with that occurring unless picking the wrong
> interface on the system on wired.
>
> Ahh, yes on "wired".  Wireless is different - depending on the wireless,
> the router/ap might not let you get another address.  Enterprise (and
> commercial hotspot systems) wifi systems like cisco do things like dhcp
> binding for the host, disallowing you as the cpe device from binding with
> an additional mac address on that session as "bridged".  Your only
> alternative at that point is to use the nat interface for translating you
> out via your acquired host address off an internal interface.
>
> -mb
>
>
> On 02/03/2015 08:07 PM, Michael Torres wrote:
>
>          Hello all,
>
>  I have an problem that  I cannot seem to figure out.....
>
>  I am trying to use "Bridged" networking in Virtual Box to a CentOS 7
> minimum install distro that I want to use for my development server.
>
>  I have used Bridged networking in the past and never had any issues but
> that was with older versions of CentOS
>
>  The issue....  DHCP will not assign a IPv4 address to the server.
>
>  Here is the weird part...  I was at startbucks and actually got it to
> work! (Please, hold the "Just use it at starbucks then" comments..I
> know....)
>
>  Here is the process I used...
>
>  -Installed a fresh CentOS 7 on VBox
>  -While on NAT,  I performed "yum update" so my server was fresh with the
> latest
>  -Disabled SELinux
>  -Disabled the Firewall
>  -Shut down server to reconfigure the adapter to "Bridged"
>  -used adapter type of "Intel Pro 1000 MT Desktop (82540EM)"
>  -set it to "Promiscuous Mode"
>  -restart the server
>
>
>  Again, at Starbucks it assigned a IP address, so this leads me to believe
> that the issue is with a configuration on my router.
>
>  I am not very good at networking, so any help would be appreciated.
>
>  If you need error messages or other output, let me know (and possibly the
> command as I don't know networking that well other than "ifconfig")
>
>
> Mike
>
>
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