Ubuntu Server cannot see Internet but can see machines on local network
UPDATE:
Fresh installation Ubuntu 12.04 solved the issue
************************************************** ***
Hi all,
I thought of upgrading my Ubuntu server to latest release (it is used as a backup / movie server only, so no GUI on it, command line only) and today I realise (after 2 years running it) that it will not see/ping any external addresses beyond the Gateway (192.160.0.1). I have edited etc/resolv.conf
Code:
nameserver 192.168.0.1
nameserver 61.9.195.193
nameserver 61.9.207.1
When I ping (say Yahoo.com) I get no replies (it just hangs, although the IP is resolved - 206.190.36.45). When I ping same site from one of the Win PCs it replies OK (so firewall/router/modem not stopping ping).
ifconfig is as follows:
Code:
bond0 Link encap:Ethernet HWaddr 00:1b:fc:6a:c2:79
inet addr:192.168.0.31 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21b:fcff:fe6a:c279/64 Scope:Link
UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1
RX packets:60508 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5266023 (5.2 MB) TX bytes:468 (468.0 B)
eth0 Link encap:Ethernet HWaddr 00:1b:fc:6a:d1:00
inet addr:192.168.0.198 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21b:fcff:fe6a:d100/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17954617 errors:0 dropped:0 overruns:0 frame:0
TX packets:4229235 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:21571837170 (21.5 GB) TX bytes:9053079394 (9.0 GB)
Interrupt:17
eth1 Link encap:Ethernet HWaddr 00:1b:fc:6a:c2:79
UP BROADCAST RUNNING SLAVE MULTICAST MTU:1500 Metric:1
RX packets:60508 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5266023 (5.2 MB) TX bytes:468 (468.0 B)
Interrupt:16 Base address:0xac00
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1736 errors:0 dropped:0 overruns:0 frame:0
TX packets:1736 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:114176 (114.1 KB) TX bytes:114176 (114.1 KB)
Can anybody help me understand why the network is working OK peer to peer but the server cannot reach outside?
There is only one firewall in the place and that is on my DLink router.
Thanks in advance!
Re: Ubuntu Server cannot see Internet but can see machines on local network
Hi,
what kind of hardware is in use? Please show:
Code:
uname -a
lspci -nnk | grep -iA2 net
lsmod
cat /etc/network/interfaces
dmesg | egrep 'eth0|eth1'
cat /etc/udev/rules.d/70-persistent-net.rules
route -n
Re: Ubuntu Server cannot see Internet but can see machines on local network
Hi praseodym
Thanks for the reply. Here's the info you requested.
uname -a
Code:
Linux LSERVER 2.6.38-11-server #48-Ubuntu SMP Fri Jul 29 19:20:32 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
lspci -nnk | grep -iA2 net
Code:
02:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller [11ab:4364] (rev 12)
Subsystem: ASUSTeK Computer Inc. Device [1043:81f8]
Kernel driver in use: sky2
--
05:04.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet [10ec:8167] (rev 10)
Subsystem: ASUSTeK Computer Inc. Device [1043:820d]
Kernel driver in use: r8169
lsmod
Code:
Module Size Used by
bonding 113742 0
snd_hda_codec_hdmi 28167 1
arc4 12529 2
rtl8187 60982 0
mac80211 290274 1 rtl8187
snd_hda_codec_analog 98042 1
radeon 982152 1
cfg80211 178528 2 rtl8187,mac80211
eeprom_93cx6 12725 1 rtl8187
hid_a4tech 12678 0
snd_hda_intel 33176 0
ttm 76664 1 radeon
snd_hda_codec 103768 3 snd_hda_codec_hdmi,snd_hda_codec_analog,snd_hda_intel
snd_hwdep 13604 1 snd_hda_codec
snd_pcm 96297 3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
drm_kms_helper 42136 1 radeon
snd_timer 29602 1 snd_pcm
serio_raw 13166 0
snd 67346 7 snd_hda_codec_hdmi,snd_hda_codec_analog,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer
soundcore 12680 1 snd
drm 227498 3 radeon,ttm,drm_kms_helper
i2c_algo_bit 13400 1 radeon
snd_page_alloc 18529 2 snd_hda_intel,snd_pcm
asus_atk0110 17976 0
lp 17789 0
parport 46458 1 lp
raid10 30673 0
raid456 62777 1
async_pq 12995 1 raid456
async_xor 12879 2 raid456,async_pq
xor 12890 1 async_xor
async_memcpy 12529 1 raid456
async_raid6_recov 12776 1 raid456
firewire_ohci 40370 0
firewire_core 62646 1 firewire_ohci
usbhid 46956 0
hid 91020 2 hid_a4tech,usbhid
r8169 48022 0
crc_itu_t 12707 1 firewire_core
mptsas 59148 4
mptscsih 44457 1 mptsas
mptbase 102904 2 mptsas,mptscsih
ahci 25951 0
libahci 26642 1 ahci
floppy 74120 0
pata_jmicron 12747 2
scsi_transport_sas 40545 1 mptsas
sky2 58509 0
raid6_pq 88307 2 async_pq,async_raid6_recov
async_tx 13349 5 raid456,async_pq,async_xor,async_memcpy,async_raid6_recov
raid1 30596 0
raid0 17271 0
multipath 13187 0
linear 12966 0
cat /etc/network/interfaces
Code:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
auto bond0
iface bond0 inet static
address 192.168.0.31
gateway 192.168.0.1
netmask 255.255.255.0
bond-slaves eth1
# LACP configuration
bond_mode balance-rr
bond_miimon 100
bond_lacp_rate 1
dmesg | egrep 'eth0|eth1'
Code:
[ 2.269040] sky2 0000:02:00.0: eth0: addr 00:1b:fc:6a:d1:00
[ 2.279180] r8169 0000:05:04.0: eth1: RTL8169sc/8110sc at 0xffffc90000c7ac00, 00:1b:fc:6a:c2:79, XID 18000000 IRQ 16
[ 7.755707] sky2 0000:02:00.0: eth0: enabling interface
[ 7.756446] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 10.484309] sky2 0000:02:00.0: eth0: Link is up at 1000 Mbps, full duplex, flow control both
[ 10.485003] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 21.192013] bonding: bond0: Adding slave eth1.
[ 21.195289] r8169 0000:05:04.0: eth1: link down
[ 21.196387] r8169 0000:05:04.0: eth1: link up
[ 21.197415] r8169 0000:05:04.0: eth1: link down
[ 21.198590] bonding: bond0: enslaving eth1 as an active interface with a down link.
[ 21.230012] eth0: no IPv6 routers present
[ 23.514182] r8169 0000:05:04.0: eth1: link up
[ 23.610586] bonding: bond0: link status definitely up for interface eth1, 1000 Mbps full duplex.
cat /etc/udev/rules.d/70-persistent-net.rules
Code:
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# PCI device 0x10ec:0x8167 (r8169)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1b:fc:6a:c2:79", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
# PCI device 0x11ab:0x4364 (sky2)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:1b:fc:6a:d1:00", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# USB device 0x0bda:0x8187 (usb)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:15:af:19:ec:28", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"
rounte -n
Code:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 bond0
0.0.0.0 192.168.0.1 0.0.0.0 UG 100 0 0 bond0
0.0.0.0 192.168.0.1 0.0.0.0 UG 100 0 0 eth0
Thanks again.
M
Re: Ubuntu Server cannot see Internet but can see machines on local network
What about the eth1 config?
Re: Ubuntu Server cannot see Internet but can see machines on local network
Sorry praseodym, I do not understand the question.
Are you referring to "eth1:link down" above? The last message on eth1 is "link status definitely up" on the bond0 statement.
Sorry, but I am not an experienced Linux person, but learning fast!
By the way, I have another thread going for an issue where the server has poor performance and timeouts on RAID6 array. I am sure these two issues are not related, but just in case! http://ubuntuforums.org/showthread.php?t=2152585
Thanks!
M
Re: Ubuntu Server cannot see Internet but can see machines on local network
Are the following packages installed?
Code:
sudo apt-get install ifenslave-2.6 net-tools ethtool bmon
Please show:
Code:
sudo mii-tools
modprobe --list | grep -i bonding
find /lib/modules/`uname -r` -iname bonding*
Please google-translate the following page:
http://wiki.ubuntuusers.de/Netzwerkk...ighlight=bond0
You can find config examples there in the grey boxes. Obviously, the eth0 config is not necessary.
Or here in english:
https://help.ubuntu.com/community/UbuntuBonding
