Ethernet Setting Messed up during OpenVPN installation

[1991sudarshan]

I am not able to connect to internet through wired ethernet. I guess, it got messed up durning the openvpn installation and configuration. I removed openvpn and reverted the settings, still ethernet connection is not working. I am able to connect to internet only through Wi-Fi.

Here are the results of few commands which I ran to figure out what's wrong with the ethernet connection but I couldn't find out what is the issue.


sudarshan@sudarshan-laptop:~$ sudo ifconfig
eth0 Link encap:Ethernet HWaddr e8:9a:8f:1f:90:cf
inet6 addr: fe80::ea9a:8fff:fe1f:90cf/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:754 errors:0 dropped:0 overruns:0 frame:0
TX packets:802 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:137707 (137.7 KB) TX bytes:151073 (151.0 KB)
Interrupt:44 Base address:0x4000

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:889 errors:0 dropped:0 overruns:0 frame:0
TX packets:889 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:88195 (88.1 KB) TX bytes:88195 (88.1 KB)

wlan0 Link encap:Ethernet HWaddr 68:a3:c4:98:ea:f9
inet addr:192.168.10.104 Bcast:192.168.10.255 Mask:255.255.255.0
inet6 addr: fe80::6aa3:c4ff:fe98:eaf9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5520 errors:0 dropped:0 overruns:0 frame:0
TX packets:5220 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3694145 (3.6 MB) TX bytes:764805 (764.8 KB)

sudarshan@sudarshan-laptop:~$



sudarshan@sudarshan-laptop:~$ ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Cannot get link status: Operation not permitted
sudarshan@sudarshan-laptop:~$


sudarshan@sudarshan-laptop:~$ sudo lshw -C network
*-network
description: Ethernet interface
product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: eth0
version: 05
serial: e8:9a:8f:1f:90:cf
size: 100Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8105e-1.fw latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
resources: irq:44 ioport:3000(size=256) memory:50004000-50004fff memory:50000000-50003fff


sudarshan@sudarshan-laptop:~$ cat /etc/network/interfaces
auto eth0
interface eth0 inet


sudarshan@sudarshan-laptop:~$

[Hadaka]

hi, your /etc/network/interfaces currently reads..

auto eth0
interface eth0 inet
Default setting is..

auto lo
iface lo inet loopback
please do ,,

sudo gedit /etc/network/interfaces
and make it look like this..

#auto eth0
#interface eth0 inet
auto lo
iface lo inet loopback
close and save gedit

[1991sudarshan]

hi, your /etc/network/interfaces currently reads..

auto eth0
interface eth0 inet
Default setting is..

auto lo
iface lo inet loopback
please do ,,

sudo gedit /etc/network/interfaces
and make it look like this..

#auto eth0
#interface eth0 inet
auto lo
iface lo inet loopback
close and save gedit

I did as you told, still the issues persists.
Look at this

/etc/network/interfaces/if-up.d/upstart

I commented out the get_auto_interfaces() part. The nw-applet shows the aut eth0 is connected by no internet connectivity.


#!/bin/sh
# MARK_DEV_PREFIX="/run/network/ifup."
# MARK_STATIC_NETWORK_EMITTED="/run/network/static-network-up-emitted"

set -e

# lo emission handled by /etc/init/network-interface.conf
if [ "$IFACE" != lo ]; then
#if [ "$IFACE" = lo ]; then
# exit 0
initctl emit -n net-device-up \
"IFACE=$IFACE" \
"LOGICAL=$LOGICAL" \
"ADDRFAM=$ADDRFAM" \
"METHOD=$METHOD"
fi

#initctl emit -n net-device-up \
# "IFACE=$IFACE" \
# "LOGICAL=$LOGICAL" \
# "ADDRFAM=$ADDRFAM" \
# "METHOD=$METHOD"
# get_auto_interfaces() {
# write to stdout a list of interfaces configured as 'auto' in interfaces(5)
# local found=""
# stderr redirected as it outputs things like:
# Ignoring unknown interface eth0=eth0.
# found=$(ifquery --list --allow auto 2>/dev/null) || return
# set -- ${found}
# echo "$@"
#}

#all_interfaces_up() {
# return true if all interfaces listed in /etc/network/interfaces as 'auto'
# are up. if no interfaces are found there, then "all [given] were up"
# local prefix="$1" iface=""
# for iface in $(get_auto_interfaces); do
# if cur interface does is not up, then all have not been brought up
# [ -f "${prefix}${iface}" ] || return 1
# done
# return 0
#}

# touch our own "marker" indicating that this interface has been brought up.
#: > "${MARK_DEV_PREFIX}$IFACE"

#if all_interfaces_up "${MARK_DEV_PREFIX}" &&
# mkdir "${MARK_STATIC_NETWORK_EMITTED}" 2>/dev/null; then
# initctl emit --no-wait static-network-up
#fi

[SeijiSensei]

Your wired connection is not configured to have an IP address. Contrast the "eth0" and "wlan0" lines in the ifconfig results above. In /etc/network/interfaces, add


auto eth0
iface eth0 inet dhcp

and it will get an address from your router. I suggest turning off the wifi while using the Ethernet connection to avoid confusion about routing.