Ubuntu user since 12.04, I've always found solutions to my problems here on askubuntu or elsewhere in forums or the net, but this time, after 3 weeks of patiently searching for a solution, testing my hardware in various conditions and trying other systems (e.g raspberry pi, a technician from my ISP also brought his Windrose machine - no problem with Windrose), I decided to ask my first question, because I still can't find a solution, and networking is definitely not my passion (but I'd be pleased to understand better about it).
Here is the situation.
I access to the internet from home with an ADSL, via a USB to ethernet adapter on a notebook. Countless websites I try to access can't load (ex: arduino.cc, yahoo.com, dpreview.com,...) others load normally (gmail, google, stackoverflow related websites...). This is the same for firefox and chrome.
However, if I plug in my raspberry pi with debian Jenny into my ADSL router (having obviously properly setup the connection), I can access all these websites. So this would rule out my ISP.
I also took my notebook to a place where I can access to the internet via both WiFi and ethernet (in the later case, also via the USB to ethernet adapter), and all these impossible-to-load websites can be accessed with no problem. So this would rule out my usb to ethernet adapter.
I had no problem to access these sites on ubuntu 13.10 (I've done a fresh install rather than a distribution upgrade on this machine).
So, given the detail of my system below, what could I do to be able to normally access these websites? And a side question, why does my rapsberry pi with debian can access websites while a fresh, regularly updated and upgraded 16.04 ubuntu can't (and likely requires some non obvious fiddling with network settings)?
$netstat -rn returns:
Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 0.0.0.0 188.8.131.52 0.0.0.0 UG 0 0 0 ppp0 184.108.40.206 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 ppp0
$sudo lshw -C network returns:
*-network description: Wireless interface product: Centrino Advanced-N 6235 vendor: Intel Corporation physical id: 0 bus info: pci@0000:03:00.0 logical name: wlp3s0 version: 24 serial: c4:85:08:21:f2:7d width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-66-generic firmware=220.127.116.11 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn resources: irq:32 memory:f7800000-f7801fff *-network description: Ethernet interface physical id: 1 logical name: enx9cebe8076efa serial: 9c:eb:e8:07:6e:fa size: 100Mbit/s capacity: 100Mbit/s capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=asix driverversion=22-Dec-2011 duplex=full firmware=ASIX AX88772 USB 2.0 Ethernet link=yes multicast=yes port=MII speed=100Mbit/s
# 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
enx9cebe8076efa Link encap:Ethernet HWaddr 9c:eb:e8:07:6e:fa inet6 addr: fe80::1f3e:719d:994f:795a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:52336 errors:0 dropped:0 overruns:0 frame:0 TX packets:58855 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15400674 (15.4 MB) TX bytes:9900518 (9.9 MB) 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:13687 errors:0 dropped:0 overruns:0 frame:0 TX packets:13687 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:1262209 (1.2 MB) TX bytes:1262209 (1.2 MB) ppp0 Link encap:Point-to-Point Protocol inet addr:18.104.22.168 P-t-P:22.214.171.124 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:51849 errors:0 dropped:0 overruns:0 frame:0 TX packets:58317 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:14959875 (14.9 MB) TX bytes:8358217 (8.3 MB)
127.0.0.1 localhost 127.0.1.1 ludo-UX32VD # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters