PPPOE gets connected but I can't browse internet!

[maqtanim]

I am using a DSl connection in my desktop. My desktop has two OSs - Windows 7 and Ubuntu 12.04. After installing Ubuntu 12.04 last month, I was successfully using internet in my desktop by using the command sudo pppoeconf. Today I received a update notification (via update manager) and I clicked to update. After a while I couldn't browse the internet anymore (and the update process didn't complete). I ran sudo pppoeconf, it seemed that the connection was established. To check the connection I also ran plog and I got the following output:

tanim@maqdesktop:~$ plog
May 17 18:02:06 maqdesktop pppd[3481]: Connect: ppp3 <--> eth0
May 17 18:02:06 maqdesktop pppd[3481]: Remote message: Login ok
May 17 18:02:06 maqdesktop pppd[3481]: PAP authentication succeeded
May 17 18:02:06 maqdesktop pppd[3481]: peer from calling number 00:00:00:EE:FF:F4 authorized
May 17 18:02:06 maqdesktop pppd[3481]: not replacing existing default route through ppp0
May 17 18:02:06 maqdesktop pppd[3481]: local  IP address 10.15.29.17
May 17 18:02:06 maqdesktop pppd[3481]: remote IP address 10.15.0.1
May 17 18:02:06 maqdesktop pppd[3481]: primary   DNS address 10.15.0.10
May 17 18:02:06 maqdesktop pppd[3481]: secondary DNS address 10.15.0.11

Looks like it has been connected, but I can't browse internet with both firefox and google chrome. But I can connect to internet and browse internet with Windows 7 in the same PC (actually I am writing this using Windows 7).


Any solution to this?

Other supportive informations (that may help) are given below:

tanim@maqdesktop:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr e0:69:95:90:bc:e4  
          inet6 addr: fe80::e269:95ff:fe90:bce4/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:114 errors:0 dropped:0 overruns:0 frame:0
          TX packets:438 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:17764 (17.7 KB)  TX bytes:40031 (40.0 KB)
          Interrupt:20 Memory:fe400000-fe420000 

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:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1184 (1.1 KB)  TX bytes:1184 (1.1 KB)

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:10.15.29.17  P-t-P:10.15.0.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1480  Metric:1
          RX packets:6 errors:0 dropped:0 overruns:0 frame:0
          TX packets:86 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:339 (339.0 B)  TX bytes:5647 (5.6 KB)

ppp1      Link encap:Point-to-Point Protocol  
          inet addr:10.15.29.17  P-t-P:10.15.0.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1480  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:39 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3 
          RX bytes:147 (147.0 B)  TX bytes:2374 (2.3 KB)

tanim@maqdesktop:~$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 05)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b5)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation H61 Express Chipset Family LPC Controller (rev 05)
00:1f.2 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family 4 port SATA IDE Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 05)
00:1f.5 IDE interface: Intel Corporation 6 Series/C200 Series Chipset Family 2 port SATA IDE Controller (rev 05)
01:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10)

tanim@maqdesktop:~$ lsmod
Module                  Size  Used by
xt_TCPMSS              12619  1 
xt_tcpmss              12453  1 
xt_tcpudp              12531  1 
iptable_mangle         12646  1 
ip_tables              18106  1 iptable_mangle
x_tables               21974  5 xt_TCPMSS,xt_tcpmss,xt_tcpudp,iptable_mangle,ip_tables
pci_stub               12550  1 
vboxpci                22882  0 
vboxnetadp             13328  0 
vboxnetflt             27211  0 
vboxdrv               252188  3 vboxpci,vboxnetadp,vboxnetflt
pppoe                  17513  2 
pppox                  13158  1 pppoe
rfcomm                 38139  12 
bnep                   17830  2 
binfmt_misc            17292  1 
snd_hda_codec_realtek   174055  1 
ppdev                  12849  0 
gspca_ov519            40522  0 
gspca_main             27654  1 gspca_ov519
videodev               86588  1 gspca_main
btusb                  17912  2 
bluetooth             158438  23 rfcomm,bnep,btusb
snd_hda_intel          32765  3 
snd_hda_codec         109562  2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep              13276  1 snd_hda_codec
snd_pcm                80845  2 snd_hda_intel,snd_hda_codec
parport_pc             32114  1 
snd_seq_midi           13132  0 
snd_rawmidi            25424  1 snd_seq_midi
snd_seq_midi_event     14475  1 snd_seq_midi
snd_seq                51567  2 snd_seq_midi,snd_seq_midi_event
snd_timer              28931  2 snd_pcm,snd_seq
snd_seq_device         14172  3 snd_seq_midi,snd_rawmidi,snd_seq
shpchp                 32325  0 
mac_hid                13077  0 
snd                    62064  15 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore              14635  1 snd
snd_page_alloc         14108  2 snd_hda_intel,snd_pcm
i915                  414603  3 
mei                    36570  0 
drm_kms_helper         45466  1 i915
drm                   197692  4 i915,drm_kms_helper
i2c_algo_bit           13199  1 i915
video                  19068  1 i915
w83627ehf              29485  0 
hwmon_vid              12723  1 w83627ehf
coretemp               13269  0 
lp                     17455  0 
parport                40930  3 ppdev,parport_pc,lp
usbhid                 41906  0 
hid                    77367  1 usbhid
e1000e                140005  0

[nothingspecial]

Thread moved to Networking & Wireless.

[satish_j]

Is the nm-applet showing network as connected?

[poolet]

1st: Can you ping domain names and IP addresses, If yes may your browser corrupted files.. Try to used different browser or re-install your browser...

2nd: Did you used any kind of firewall ?? try to configure .conifg or disable it.. (ps -A to see whats running..)

3th: Do you have any other machines connected on your network?? what about authentication of that?? try to set manually ip address of other machine as localhost and try again..

4th: did you try to ping external ip web sites?? . Try to ping www.yahoo.com (87.248.112.181, may is different for you),If you cannot ping the domain name, but are successful pinging the IP address, then it may be a DNS issue. To confirm the DNS problem, open your browser and type in( the ip of your country www.yahoo.com that you must get from pinging to www.yahoo.com), this will not require any DNS resolution and should open up just fine to www.yahoo.com. If that works, then you may want to change the DNS server you are using. also if you cannot ping (yahoo.com ip address) then it's not a DNS resolution issue, but a communication issue....

Final:: Before you complete the above steps, did you try to clear you browser file & flush dns cache??

5) a) flush dns cache::

sudo aptitude install nscd

sudo /etc/init.d/nscd restart or “sudo bash /etc/…” (bash after sudo)

5 b) clear all files and history of your browser

Try again...

If your problem is not fixed.. Download nmap & wireshark

Capture the network at PPPOE and filter your connection at point-to-point with your default router address,
if your using cisco type, you may need to flush your firmware of your router(let me know what version you have - only if your are using cisco/linksys product..)

while your capturing the out-bounded traffic check for forwarding tcp/ip protocols by the filtering on PPPOE....
a good idea post a picture with your capturing or save the file as and share it(changing the addressing is a good idea!!! )...


Good luck!!!