[SOLVED] Virginmedia and Ubuntu

Hello All, THanks in advance for any replies.

I have just had virginmedia broadband installed which seems to work fine when booted into Vista but not in Ubuntu 8.10.

I am connected direct into a cable modem. eth0 gets an IP I can use nslookup and ftp from the command line which suggests all is ok. But I cant browse the web. every time I try to from firefox (No proxy setting) it just hangs and does not connect. It all works fine when connect to my wired work network.

I also get framing errors as follows which I dont get when connected to my work net...

spencerb@spencerb-laptop:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1d:09:3a:ad:95 inet addr:82.2.217.94 Bcast:82.2.219.255 Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST MTU:150 Metric:1 RX packets:12 errors:40 dropped:0 overruns:0 frame:40 TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1110 (1.1 KB) TX bytes:2974 (2.9 KB) Interrupt:17

lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:242 errors:0 dropped:0 overruns:0 frame:0 TX packets:242 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:15140 (15.1 KB) TX bytes:15140 (15.1 KB)

Routing table is as follows...

spencerb@spencerb-laptop:~$ netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 82.2.216.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 82.2.216.1 0.0.0.0 UG 0 0 0 eth0 spencerb@spencerb-laptop:~$ netstat -r Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 82.2.216.0 * 255.255.252.0 U 0 0 0 eth0 link-local * 255.255.0.0 U 0 0 0 eth0 default cpc1-rdng4-0-0- 0.0.0.0 UG 0 0 0 eth0

nslookup......

spencerb@spencerb-laptop:~$ nslookup

google.co.uk

Server: 194.168.4.100 Address: 194.168.4.100#53

Non-authoritative answer: Name: google.co.uk Address: 72.14.221.104 Name: google.co.uk Address: 66.249.93.104 Name: google.co.uk Address: 216.239.59.104

ftp....

Connected 220 Welcome to FTP site Name (spencerb): Login failed. ftp> quit 221 Goodbye.

For instance, when I browse...

Before...

spencerb@spencerb-laptop:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1d:09:3a:ad:95 inet addr:82.2.217.94 Bcast:82.2.219.255 Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST MTU:150 Metric:1 RX packets:24 errors:43 dropped:0 overruns:0 frame:43 TX packets:47 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2240 (2.2 KB) TX bytes:4708 (4.7 KB) Interrupt:17

After...

spencerb@spencerb-laptop:~$ start up f fox start: Need to be root spencerb@spencerb-laptop:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1d:09:3a:ad:95 inet addr:82.2.217.94 Bcast:82.2.219.255 Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST MTU:150 Metric:1 RX packets:36 errors:65 dropped:0 overruns:0 frame:65 TX packets:63 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3241 (3.2 KB) TX bytes:6271 (6.2 KB) Interrupt:17

I have not checked on vista if im getting errors as yet which and that its just handling them better. I will do when im back home.

THanks in advance for any help.

Sorry forget to add my config...

Dell XPS M1330 Intel(R) Core(TM)2 Duo CPU T7250 @ 2.00GHz 3GB RAM 250GB HDD nVidia Corporation GeForce 8400M Intel Corporation PRO/Wireless 3945ABG Broadcom Corporation NetLink BCM5906M Fast Ethernet PCI Express

Thx again, Spence.

Hello all, Still seeing this problem. Any one have any ideas ??

It works fine on Opensolaris and Vista out of the box but for some reason not Ubuntu :( I have tried booting of the live CD and get the same results.

I know its not a MAC addr issue as its the same H/W and the OS is the same on all OS's i.e the OS is not doing anything weird with it.

From tcpdump/wireshark I see the following....

Frame 10 (114 bytes on wire, 96 bytes captured) Ethernet II, Src: Dell, Dst: Cisco Transmission Control Protocol, Src Port: 37110 (37110), Dst Port: http (80), Seq: 393, Ack: 1, Len: 48 Hypertext Transfer Protocol [Packet size limited during capture: HTTP truncated]

Frame 11 (66 bytes on wire, 66 bytes captured) Ethernet II, Src: Cisco, Dst: Dell Transmission Control Protocol, Src Port: http (80), Dst Port: 37110 (37110), Seq: 1, Ack: 393, Len: 0

Frame 12 (114 bytes on wire, 96 bytes captured) Ethernet II, Src: Dell, Dst: Cisco Transmission Control Protocol, Src Port: 37110 (37110), Dst Port: http (80), Seq: 393, Ack: 1, Len: 48 Hypertext Transfer Protocol [Packet size limited during capture: HTTP truncated]

Frame 13 (66 bytes on wire, 66 bytes captured) Ethernet II, Src: Cisco, Dst: Dell Transmission Control Protocol, Src Port: http (80), Dst Port: 37110 (37110), Seq: 977, Ack: 441, Len: 0

Any help is appreciated.

Thanks in advance, Spence.

Anyone have any ideas ?.

Thx again in advance, Spence.

How exactly are you connecting, what hardware, router, modem? via a server?

Raz

Hi Raz,

Its basically a cat5 cable pluged direct into eth0 (RJ45 port) and into the back of the cable modem (RJ45 port). This modem is pluged into the the virgin media wall connection which was supplied and installed by virginmedia.

Its a weird one unless im missing something, strange that Open Solaris and Vista work fine out of the box and Ubuntu does no

Thanks again, Spence.

I take it you are using the virgin media modem(speedtouch), not a router. In network manager is your ip address showing as 192.168.X.X(X being any number) how do the details compare to vista? ip address, dns etc, they should be the same.

Raz

<removed as posted twice :) >

Hi Raz

I take it you are using the virgin media modem(speedtouch), not a router.

Thats right, its a new connection and I have not got round to buying a wireless router etc as yet.

In network manager is your ip address showing as 192.168.X.X(X being any >number) how do the details compare to vista? ip address, dns etc, they >should be the same.

Its actually an 82.3.x.x addr which is got via DHCP. THis happends on Ubuntu, Solaris and Vista ok. And I am able to ftp/ping from all 3. Its basically just http stuff that seem broke on Ubuntu. I have checked my browser setting etc and all is ok.

If I disconnect from my home wired net and plug into my work wired net without rebooting etc so all setting are the same, it all works fine. Of course I get a diff DHCP addr here.

At home I seem to get packets like the following from tcpdump/wireshark...

Frame 10 (114 bytes on wire, 96 bytes captured) Ethernet II, Src: Dell, Dst: Cisco Transmission Control Protocol, Src Port: 37110 (37110), Dst Port: http (80), Seq: 393, Ack: 1, Len: 48 Hypertext Transfer Protocol [Packet size limited during capture: HTTP truncated]

Frame 11 (66 bytes on wire, 66 bytes captured) Ethernet II, Src: Cisco, Dst: Dell Transmission Control Protocol, Src Port: http (80), Dst Port: 37110 (37110), Seq: 1, Ack: 393, Len: 0

and framing errors....

spencerb@spencerb-laptop:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:1d:09:3a:ad:95 inet addr:82.3.N.9N Bcast:82.3.X.X Mask:255.255.252.0 UP BROADCAST RUNNING MULTICAST MTU:150 Metric:1 RX packets:24 errors:43 dropped:0 overruns:0 frame:43 TX packets:47 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2240 (2.2 KB) TX bytes:4708 (4.7 KB) Interrupt:17

which I dont get under Solaris or Vista

THanks again, Spence who is confused.

The only thing i can think of is that ubuntu has a problem with the modem, the reason being you can connect easy enough at work, i personally did not get on with it even on xp, it had a habit of trying to establish its own version of explorer which confused my pc so i had to disable the original i.e and allow virgin media's version as the default, they were no help as all they said was if you put in the supplied disc, etc.

found these 2 links may be of some use. http://www.linux-usb.org/SpeedTouch/ http://ubuntuforums.org/showthread.php?t=969938

Raz

Thanks Raz, It does look like Ubuntu out of the box has a problem with the modem. I thought this was the case because of the frame errors. I wondered if I need to change the out of the box setting to get it working but as of yet have not found what

Thanks for the links, I will have a read thru but one of them is for a USB modem and mine isnt one, er I think.

Spence.

Have you looked at what your MTU settings are do they match, just an idea.

Raz

just checked your settings against mine your mtu is only 150

UP BROADCAST RUNNING MULTICAST MTU:150 Metric:1

mine is 1500 which is correct if you check this link it should help you change the mtu setting. http://ubuntuforums.org/showthread.php?t=289077 my connection is just set to auto eth0 and automatic(dhcp) worked first time .

Right-click on the network manager icon and do Connection Information. Is the DNS server showing as 194.168.4.100?

Thanks very much for all your replies, manually changing the MTU to 1500 fixed it :)

Looks like this is not being set currently when eth0 gets the addr from DNS.

Thanks again, Spence.