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AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

Wierd issue with Comcast and Linux..

I just switched to Comcast 30 Mbps internet,and now my backup Linux PC won't connect to the internet at all.

I'm using the stock Ubee cable modem, hooked up to my trusty Zyxel X550N router.

Bizzarely,my main Windows 7 PC connects to the internet just fine.

This is too wierd.

ncherry
Premium Member
join:2003-07-13
Monroe Township, NJ

ncherry

Premium Member

Are you running DHCP ? You're really not telling us anything. Is your IP address/interface (can you connect to the box locally?). What does you /etc/resolv.conf look like ?

pflog
Bueller? Bueller?
MVM
join:2001-09-01
El Dorado Hills, CA

pflog to AMD64Blondie

MVM

to AMD64Blondie
So the only thing that changed was the speed plan you're on?

Sounds more like a problem with your Linux box not running a DHCP client properly or something that coincided with the speed change to me.

As ncherry See Profile said, we need more info.
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

Oddly enough,my Linux PC connected to the internet perfectly when I had my Centurylink PK5001Z gateway hooked up.

(before I returned the gateway after canceling my Centurylink internet.)

I just switched to Comcast earlier this month.

Now with my Ubee cable modem and my Zyxel X550N router hooked up.. no connection at all on my Linux PC.

I'm running Ubuntu 11.10 at the moment.

pflog
Bueller? Bueller?
MVM
join:2001-09-01
El Dorado Hills, CA

pflog

MVM

I assume you have it connected like this:

Ubee
|
Zyxel
|
Linux box

If so, let's see output of ps auwwx and ifconfig on the Linux box.

This may be more appropriate in the All Things Unix forum if it's just a problem with the Linux box getting a DHCP address from the Zyxel.

»Unix and Linux
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

Ifconfig says Link Encap Local Loopback:
inetaddr: 127.0.0.1 Mask 255.0.0.0 .

What exactly does this mean?

(I'm completely in the dark about Linux networking.)

pflog
Bueller? Bueller?
MVM
join:2001-09-01
El Dorado Hills, CA

pflog

MVM

said by AMD64Blondie:

It says Link Encap Local Loopback:
inetaddr: 127.0.0.1 Mask 255.0.0.0 .

What exactly does this mean?

(I'm completely in the dark about Linux networking.)

Your ethernet device isn't configured. If you run ifconfig -a do you see an eth0 and/or eth1, etc? I am assuming this is ethernet and not wifi, but you did not specify.

I'll ask the mods to move this over to ATU. It's not a Comcast isssue.
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

Sorry,my bad. I wasn't really sure where to post my question.

I'm connected via Ethernet.(It's hardwired.)

pflog
Bueller? Bueller?
MVM
join:2001-09-01
El Dorado Hills, CA

pflog

MVM

said by AMD64Blondie:

Sorry,my bad. I wasn't really sure where to post my question.

No worries. I'm sure ATU will get things figured out for ya!
pablo
MVM
join:2003-06-23

pablo to AMD64Blondie

MVM

to AMD64Blondie
Hi,

Let's backup a bit ... first, type and paste the results of "cat /etc/issue"

You'll need to open a terminal window to do so.

What we need to know is what distro of Linux you're on so folks can provide you with the quickest way for you to configure your NIC.

Cheers,
-pablo
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

I'm running Ubuntu 11.10 64-bit.

This is weird.When I type "cat /etc/issue" in the terminal,it says no such file or directory.Am I entering it wrong?
pablo
MVM
join:2003-06-23

pablo

MVM

Hi,

Don't worry about the fact you can't see /etc/issue, we have the data you need: you're running Ubuntu.

I'm an openSUSE person but there are tons of Ubuntu people on here who can provide you a web link on how to configure your network.

You could also google around to figure it out. What you want to do is set up DHCP.

Cheers,
-pablo
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

I'd prefer a link on how to set up my network,as this is very confusing for me.

darcilicious
Cyber Librarian
Premium Member
join:2001-01-02
Forest Grove, OR

darcilicious

Premium Member

Start here: »help.ubuntu.com/11.10/ub ··· net.html and then select wired or wireless as needed and work your way through the documentation.
darcilicious

darcilicious

Premium Member

I should have mentioned, you're setting up your Linux desktop as a DHCP client NOT as a DHCP server.
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

Ah crap.

Configured it perfectly(or so I thought)...but it still doesn't connect.

(even though it shows that I'm getting a IP address on my Linux PC.)

Too weird.

orion940
Attractive like a magnet
Premium Member
join:2001-12-23
Windsor, CT

orion940

Premium Member

do this:

sudo ifconfig eth0

and paste it back here.

O.
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

It just says device not found.

orion940
Attractive like a magnet
Premium Member
join:2001-12-23
Windsor, CT

orion940 to AMD64Blondie

Premium Member

to AMD64Blondie
just type ifconfig

O.
AMD64Blondie
join:2007-08-17
Portland, OR

AMD64Blondie

Member

Think my Zyxel X550N is slowly dying.

Tried hooking up 2 other Zyxel routers,neither one would work.

So,I decided to order a new Rosewill RNX-N150RT router from Amazon.com. It was $18.99 with $3.99 1-day Prime shipping.
($22.98 total.)
pablo
MVM
join:2003-06-23

pablo

MVM

Hi,

If you want help, you need to answer the questions asked ... Orion asked for the results of "ifconfig"

Cheers,
-pablo

Rexter
Libertas, Aequitas, Veritas
join:2002-11-17
cloud 9

Rexter

Member

Sounds like he figured it out. Router problem. Problem solved. Good enough, right.
pablo
MVM
join:2003-06-23

pablo

MVM

Without the requested data, I can't be sure.

pflog
Bueller? Bueller?
MVM
join:2001-09-01
El Dorado Hills, CA

1 recommendation

pflog

MVM

said by pablo:

Without the requested data, I can't be sure.

The router dying may be true, but I think it's orthogonal.

The fact that the OP doesn't even have an eth0 configured means even if the router were working properly, it wouldn't work. So I agree with you.

The OP should provide sudo ifconfig -a output. Sounds like the ethernet card isn't being recognized or the kernel/module support isn't there.
pablo
MVM
join:2003-06-23

1 recommendation

pablo

MVM

Not to drum the issue into the ground but when people ask for help, they need to provide the data requested.

At this point, I'm /less/ likely to help the OP.

Cheers,
-pablo

piper
Premium Member
join:2001-04-19
Buffalo, NY

piper to AMD64Blondie

Premium Member

to AMD64Blondie
said by AMD64Blondie:

Ah crap.

Configured it perfectly(or so I thought)...but it still doesn't connect.

(even though it shows that I'm getting a IP address on my Linux PC.)

Too weird.

as root

ifdown eth0
ifup eth0

that should work in ubuntu, but, i don't consider ubuntu, debian, so it might not, but, that paste we need

Exodus
Your Daddy
Premium Member
join:2001-11-26
Earth

Exodus to AMD64Blondie

Premium Member

to AMD64Blondie
Should run an ifconfig -a instead of ifconfig. ifconfig by itself will only list adapters with active ethernet activity.

ifconfig -a will list all ethernet devices, whether online or not.

andyross
MVM
join:2003-05-04
Aurora, IL

andyross to AMD64Blondie

MVM

to AMD64Blondie
Is it possible, as a test, to connect the computer directly to the modem, and then reboot the modem, then the computer? That will take the router out of the loop.