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Old 07-23-2014, 11:38 AM   #1
jdkaye
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Wifi: I can connect to the BT hub but no further.


I'm running Debian Testing on a Samsung laptop that has built-in wifi adapter. The system has worked flawlessly for a few years and I have not changed anything of significance since my update which I did last Sunday. Yesterday (Tuesday) I brought my laptop over to a neighbours who was having trouble with his Wifi. He uses a BT Home Hub 4. Previously my laptop had worked with no problems at his house but now I can activate the Wifi connection (I use network-manager) but I can only access the hub. Trying to load any web external pages fails and I can only access 192.168.1.254, the hub's configuration page. Pinging any external IP address yields "Destination Host Unreachable".

I returned there today and the same thing. I could connect to the hub with no problem but couldn't get any further. When I got home I tried connecting to my own hub, a BT Home Hub 5 and the same thing happened. I the Wifi connection started up normally and everything appeared as usual but I found I could not connect with anything beyond the home local network. I could ssh to this computer (my desktop workhorse computer) and connect to the Hub page 192.168.1.254 but nothing at all non-local. This is very strange; almost as if my laptop caught some sort of sickness.

Any suggestions as to what's going on and how to fix this would be most welcome. Let me stress that the other 2 computers on my local network are functioning normally. I haven't made any changes to the hub's configuration. This is truly perplexing.

jdk

Last edited by jdkaye; 07-23-2014 at 11:41 AM.
 
Old 07-23-2014, 07:24 PM   #2
frankbell
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Can you establish a wired connection? That might help show whether this is just a wifi problem or possibly something else.
 
Old 07-23-2014, 08:03 PM   #3
timl
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some quite random thoughts:
  • can you flick wifi off and then on to see what is logged in /var/log/messages?
  • another suggestion, largely the same as frankbell's, do you have a usb wifi dongle handy you can try?
  • I suppose cycling the router is not going to achieve much!

Cheers
 
Old 07-23-2014, 08:17 PM   #4
jefro
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dig
nslookup
 
Old 07-23-2014, 11:09 PM   #5
jdkaye
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Quote:
Originally Posted by frankbell View Post
Can you establish a wired connection? That might help show whether this is just a wifi problem or possibly something else.
Hi Frank,
Yes, one of the first things I thought of. My one bit of cable has one end mangled so I'll go to the shops and get some more and give it a try if it's still a problem.
Thanks,
jdk
 
Old 07-23-2014, 11:21 PM   #6
jdkaye
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Quote:
Originally Posted by jefro View Post
dig
nslookup
Here's the output.
Code:
~$ dig

; <<>> DiG 9.9.5-4-Debian <<>>
;; global options: +cmd
;; connection timed out; no servers could be reached
So I'm boxed in the BT Home hub.

Code:
~$ nslookup linuxquestions.org
Server:         192.168.1.254
Address:        192.168.1.254#53

Non-authoritative answer:
Name:   linuxquestions.org
Address: 75.126.162.205
Using the Hub's dns server (which I can access) rather than my normal external dns server.
jdk
 
Old 07-23-2014, 11:23 PM   #7
jdkaye
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Quote:
Originally Posted by timl View Post
some quite random thoughts:
  • can you flick wifi off and then on to see what is logged in /var/log/messages?
  • another suggestion, largely the same as frankbell's, do you have a usb wifi dongle handy you can try?
  • I suppose cycling the router is not going to achieve much!

Cheers
Some good suggestions. I'll give them a try and report back the results.
jdk
 
Old 07-24-2014, 07:41 PM   #8
jefro
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So when you put 75.126.162.205 address line what do you get?

Odd that dig doesn't report.

Could this be an IPv6 deal also?
 
Old 07-25-2014, 12:24 AM   #9
jdkaye
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Quote:
Originally Posted by jefro View Post
So when you put 75.126.162.205 address line what do you get?
It's not a DNS problem. First thing I tested. Putting an IP in the address line yields the same "Sorry, there is a problem" page coming up.
Quote:
Odd that dig doesn't report.
It is indeed.

Could this be an IPv6 deal also?[/QUOTE]
Nope it couldn't. Here's the Hub's statement:
Quote:
IPv6 Status

IPv6 Hub Status: Disabled
IPv6 Network Status: Disabled

IPv6 will be disabled on your BT Home Hub and BT Broadband Network until supported by future services
A live CD connects normally to the Hub and the Internet normally and automatically. All you do is give the hub's password.
jdk
 
Old 07-26-2014, 09:21 AM   #10
jdkaye
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The problem gets even weirder. I boot off an Ubuntu 14.04 LTS installation stick and it spots the Wifi connection asks for the password; accepts the password and connects to the internet without a problem.

I boot of a Debian Jessie netinstall installation stick and it spots the Wifi connection asks for the password; rejects the password (the same one that Ubuntu accepts) and no amount of retries will change it's mind. Why does my Samsung laptop hate Debian (after liking it for 2/3 years)?
jdk
 
  


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