Na mesma máquina ao executar a conexão de Internet com fio do Windows por um cabo Ethernet ao roteador, a conexão é boa; mas ao rodar o LiveCD do Ubuntu (do pendrive), pingue OK, mas sem acesso à Internet: nem via browser, nem telnet, nem wget.
O mesmo LiveCD do Ubuntu do mesmo dispositivo USB funciona bem em outra máquina na mesma LAN conectada ao mesmo roteador usando o mesmo cabo Ethernet.
Ajuda, por favor!
algumas informações do console:
it@it:~$ ifconfig
enp1s5 Link encap:Ethernet HWaddr 00:16:e6:6b:cb:0a
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::516b:4c39:6903:db89/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1489 errors:0 dropped:0 overruns:0 frame:0
TX packets:763 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:167243 (167.2 KB) TX bytes:64046 (64.0 KB)
Interrupt:21
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:65536 Metric:1
RX packets:399 errors:0 dropped:0 overruns:0 frame:0
TX packets:399 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:44528 (44.5 KB) TX bytes:44528 (44.5 KB)
it@it:~$ lspci
00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)
00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01)
00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 01)
00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 01)
00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 01)
00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 01)
00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation NM10/ICH7 Family SATA Controller [IDE mode] (rev 01)
00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 01)
01:05.0 Ethernet controller: Marvell Technology Group Ltd. 88E8001 Gigabit Ethernet Controller (rev 13)
it@it:~$ nslookup ya.ru 192.168.1.1
Server: 192.168.1.1
Address: 192.168.1.1#53
Non-authoritative answer:
Name: ya.ru
Address: 213.180.204.3
Name: ya.ru
Address: 93.158.134.3
Name: ya.ru
Address: 213.180.193.3
it@it:~$ ifconfig -a
enp1s5 Link encap:Ethernet HWaddr 00:16:e6:6b:cb:0a
inet addr:192.168.1.3 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2348:e7a6:fb2e:c3e0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:448 errors:0 dropped:0 overruns:0 frame:0
TX packets:219 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:45571 (45.5 KB) TX bytes:20429 (20.4 KB)
Interrupt:21
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:65536 Metric:1
RX packets:248 errors:0 dropped:0 overruns:0 frame:0
TX packets:248 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:22123 (22.1 KB) TX bytes:22123 (22.1 KB)
it@it:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default KEENETIC_LITE 0.0.0.0 UG 0 0 0 enp1s5
default KEENETIC_LITE 0.0.0.0 UG 100 0 0 enp1s5
link-local * 255.255.0.0 U 1000 0 0 enp1s5
192.168.1.0 * 255.255.255.0 U 100 0 0 enp1s5
it@it:~$ cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1
Tags internet networking ping ubuntu