CentOS Networking with V Box

Fri Feb 6 13:36:13 MST 2015

you know.... I got my modem/router and had no problems with it for 6 years.
Twice now, in the same year, it has stopped sending signal to my computer
requiring me to reboot it. The first time it happened really screwed with
me as I didn't know how to fix it for a couple of days. I guess it is going
bad. Just remember this for the next time something like this or that
happens.

:-)~MIKE~(-:

On Fri, Feb 6, 2015 at 12:26 PM, Michael Torres <matorres124 at gmail.com>
wrote:

> UPDATE
>
> Not really sure what the issue was, but I reset my Router and voila!  it
> works.
>
> Thanks for all the advice.
>
> Mike
>
> 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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>>
>>
>>
>> --
>> Todd Millecam
>>
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>
>
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