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Old 01-09-2015, 10:43 AM   #1
LaVenerabile
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Cannot connect to corporate networks: can't find the server at start.ubuntu.com


Hi all

I use on my laptop, Ubuntu 14.04 LTS, arch i686 for a few months. My browser is Firefox 28.0. I can connect with no problems to domestic networks and, before the new year, I could also connect to corporate (university, library...) networks: the authentication page appeared and I could start to navigate. Coming back from the holydays, I realized that I can no more connect to this kind of networks: the connection is established but, when I open Firefox, instead of the authentication page, I obtain the "Server not found, Firefox can't find the server at start.ubuntu.com" If I look at the network properties and make a comparison with another laptop (Ubuntu 12.04.5 LTS, i686, Firefox 32.0) I see that the properties are the very same (SSID, mode: infrastruttura, ipV6 automatc mode, etc...) but on that laptop, the connection works fine.

There is something that changed in my laptop during the holydays: I have installed (with a huge effort) wine, play on linux and league of legends and all the necessary packages (automake, gnutls, gmp...) however, this process has been done on the other laptop too, even if the problems were not exactly the same as mine.

This is what I get from iwconfig.

Code:
wlan0     IEEE 802.11bgn  ESSID:"uniwifi_servizi_bncr"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 2E:A4:3C:09:DC:4F   
          Bit Rate=1 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=55/70  Signal level=-55 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:8  Invalid misc:60   Missed beacon:0

lo        no wireless extensions.

eth1      no wireless extensions.
From the laptop that works, I get

Code:
lo        no wireless extensions.

eth1      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"uniwifi_servizi_bncr"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 2E:A4:3C:09:DC:4F   
          Bit Rate=72.2 Mb/s   Tx-Power=14 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=59/70  Signal level=-51 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:170   Missed beacon:0
The result of

Code:
lspci -vvnn | grep -i wireles
is

Code:
04:00.0 Network controller [0280]: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe [1814:5390]
Thanks
 
Old 01-10-2015, 08:32 AM   #2
business_kid
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Location: Ireland
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Ok. You are associated to the IP at the end of the 2nd line above.

Ping first, your router. Then an ip known to exist on the internet; then a url. If you get the first 2, but not the third it's dns - check /etc/resolv.conf and add working nameservers.
 
Old 01-10-2015, 10:41 AM   #3
LaVenerabile
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Registered: Jan 2015
Posts: 2

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Thank you, business_kid but please, consider I am a beginner and explain me what I have to do with code lines

By "end of the second line above" you mean 2E:A4:3C:09C:4F ??

Secondly... How can I know the router IP? is it

Code:
ping 192.168.1.1
or similar? As I said, I have this problem on networks that are not domestic ones. Is there a way to know the router's IP to this kind of networks?
 
Old 01-11-2015, 04:41 AM   #4
business_kid
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Quote:
Originally Posted by LaVenerabile View Post
Thank you, business_kid but please, consider I am a beginner and explain me what I have to do with code lines
By "end of the second line above" you mean 2E:A4:3C:09C:4F ??
Yes, that's what I meant.

Quote:
Originally Posted by LaVenerabile View Post
Secondly... How can I know the router IP? is it

Code:
ping 192.168.1.1
or similar? As I said, I have this problem on networks that are not domestic ones. Is there a way to know the router's IP to this kind of networks?
If your network normally is 192.168.0.xxx, then your router is 192.168.0.1
If you are normally on 192.168.1.xxx then the router is 192.168.1.1

Whichever one answers is likely to be the router :-). You can usually get the router IP by logging int6o the router interface. In fact, it's often written on the router. Only with PPPOE can it be an oddball address.
 
  


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