CentOS Networking with V Box

[Michael Torres]

tried running the scripts you provided,  I get the message "device enp0s3
is already a member of a bridge; can't enslave it to bridge br0"

So, I am pretty sure the issue lies with my Windows machine or my Linksys
settings.

In actuality, its probably my Windows machine because I once had Bridged
networking working with my current Linksys settings.

On Wed, Feb 4, 2015 at 10:20 AM, Todd Millecam <tyggna at gmail.com> wrote:

> Might be helpful to start from square one.
>
> First thing you need to determine is if wireshark will work on your
> wifi--if it does then continue.  If it doesn't, then it only worked at
> starbucks because they have a wonkey setup where they're intentionally
> trying to capture all the internet traffic that goes through there.
>
> Here are the exact commands I use to setup a bridged interface manually on
> a systemd system using ip (as opposed to the old ifconfig), just swap out
> my ethernet ens32 for your enp0p3
>
> ]$ ip link add name br0 type bridge
> ]$ ip link set dev br0 up
> ]$ ip link set dev ens32 promisc on
> ]$ ip link set dev ens32 down && ip link set dev ens32 up
> ]$ ip link set dev ens32 master br0 #lose connection here
> ]$ modprobe tun
> ]$ ip tuntap add tap0 mode tap
> ]$ brctl addif br0 ens32
> ]$ brctl addif br0 tap0
> ]$ dhcpcd -k
> ]$ dhcpcd br0
> ]$ ping google.com
>
> If ping works, then you're setup and have a tap0 interface ready to go for
> your VM.
>
> On Wed, Feb 4, 2015 at 9:19 AM, sean <sean.a.ritzler at gmail.com> wrote:
>
>> Are you sure that it was bridged at Starbucks and not nat'd? What's the
>> wifi chip? Not all have support for being bridged.
>> On Feb 4, 2015 9:09 AM, "Michael Torres" <matorres124 at gmail.com> wrote:
>>
>>> Yes it has both ...its a laptop.  I hear what your saying but i have a
>>> hard time wrapping my head around the fact that my wireless card will
>>> communicate with starbucks router..but not mine.   I am going to try and
>>> reconfigure. My linksys router.... i have to factory reset it as i forgot
>>> the password.
>>> On Feb 4, 2015 8:36 AM, "Michael Butash" <michael at butash.net> wrote:
>>>
>>>> I don't use Cent ever, but if it's anything like Ubuntu, you get either
>>>> a) network interfaces file ala sysconfig scripts in rh derivatives or b)
>>>> NetworkManager controlling everything, but not both.  If NM is running your
>>>> stack, than it's likely ignoring those configurations as it contains all
>>>> that in dbus and /etc/NetworkManager or like.
>>>>
>>>> If that is a wireless nic, I still think the wireless isn't giving you
>>>> another address, and likely won't in all cases.  Reason is typically
>>>> wireless is meant to have a single client per security association.  This
>>>> is usually controllable to some aspect. There's a reason to prevent this -
>>>> someone bridging their laptop to strong encrypted wireless, and
>>>> representing it via old wep or like I can crack with my phone.  Might work
>>>> at home, but don't always expect that to work in more strict environments.
>>>>
>>>> Does the system have a wired nic on it?  Have you tested with that?
>>>>
>>>> If you want to see the transaction, "tcpdump -i enp0s3 port 67 or port
>>>> 68" that "outside" interface and see if you see the dhcp packet leave the
>>>> wireless.  If you get no response, your router/ap doesn't like another
>>>> request.  If not leaving that interface, it's a local system issue.
>>>>
>>>> Packets on the wire trump all, see if there are any.
>>>>
>>>> -mb
>>>>
>>>>
>>>> On 02/04/2015 01:07 AM, Michael Torres wrote:
>>>>
>>>>> I didnt think that was the reason. just for the simple fact that  I
>>>>> was connected wirelessly at Starbucks......their router assigned me an IP
>>>>> address using the enp0s3 file.
>>>>>
>>>>> anyways,  I removed the device and reinstalled, still the same thing.
>>>>> I still think its a setting in my router or perhaps Windows strikes again
>>>>> and there is something in the Network Manager that I dont understand.
>>>>>
>>>>> How frustrating.....anyways, thanks for the help, if you think of
>>>>> anything else, please let me know.
>>>>>
>>>>> Going to bed now..
>>>>>
>>>>>
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>>>
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>
>
>
> --
> Todd Millecam
>
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