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-   -   wierd internet problem on debian lenny, dell latitude e6400 (https://www.linuxquestions.org/questions/linux-networking-3/wierd-internet-problem-on-debian-lenny-dell-latitude-e6400-715549/)

kipoda 03-30-2009 01:44 PM
wierd internet problem on debian lenny, dell latitude e6400
 
hi guys!

I'm new here.

just installed Linux Lenny on a Dell Latitude E6400 laptop.

and... well, I've encounter a wired (really wired) problem.

the internet connection is up
(ifconfig says it's up, and if i run "ntlookup yahoo.com" it returns a normal ip)
but when I try to get to any internet site through the firefox (icewiesel) I get timeouts... the only site that i managed to get was debian.org (and actually, i believe it came from the cache...)
couldn't get pidgins or the synaptec to run as well...


any ideas how this could be solved?

Thank you!!

repo 03-30-2009 01:47 PM
perhaps there is a proxy enabled in firefox?
can you surf on p?

kipoda 03-30-2009 01:58 PM
hmmm... what is P?

I've tried to to surf the web using the other browser in the internet tab of the menu, but it got the same result...

farslayer 03-30-2009 02:07 PM
can you browse to a site by IP ?
http://72.14.205.147 - www.google.com

If that works then the problem is most likely with name resolution.

I have also heard that having IP6 enabled in Firefox sometimes makes it difficult to browse.
http://kb.mozillazine.org/Error_loading_any_website
Code:
  1. Type about:config in the address bar, press Enter.
  2. Find network.dns.disableIPv6 in the list.
  3. Right-click -> Toggle.
  4. Restart your Mozilla application and try again.
If that doesn't resolve the issue, then you need to look at your DNS settings
cat /etc/resolv.conf

repo 03-30-2009 02:08 PM
Quote:
hmmm... what is P?
sorry IP
any firewall?
what is the output from

Code:
telnet www.google.com 80

kipoda 03-30-2009 02:13 PM
hmm...
just tried to use the IP of google to get to it, and it worked, but when entering something to the search and hit go it once again times out.

what should i do?

kipoda 03-30-2009 02:14 PM
telnet connects as well...

kipoda 03-30-2009 02:42 PM
ha!!!!!!

the mozilla togelling worked!

I'm currently writing from the linux :)

but still, only the browser works, and nither the pidgin nor the synaptic works...
any ideas?

repo 03-30-2009 03:06 PM
take a look at
http://www.debian-administration.org/articles/409

kipoda 03-31-2009 12:51 AM
did it
didn't work :(

anything other than the icewiesel still doesn't get through to the internet

virtualx 04-08-2009 03:20 PM
I'm having a simlar problem
 
Same laptop as the parent, running kubuntu.

DNS occasionally works and occasionally doesn't. Sometimes I can resolve slashdot.org but not google.com depending on my access point.

Manually typing the IP for google does work though.

Changing the IP6 config in firefox does NOT work for me though.

Disalbing IP6 via the link to the debian page also failed:
alias: net-pf-10: not found

farslayer 04-10-2009 08:35 AM
Hmm I wonder if it is the tcp window scaling issue.. since you've already tried everything else, try this workaround posted by hobbsc

http://www.linuxquestions.org/questi...7/#post3446978

Please let us know if this works or not....

virtualx 04-14-2009 09:37 AM
still not working
 
I tried the command:
Code:
sysctl -w net.ipv4.tcp_window_scaling=0
no dice :(

also on my work network I can't bring up any sites via DNS, ip address all work fine.

farslayer 04-14-2009 11:48 AM
Try entering a different DNS Servers ?

For testing try

Code:
nameserver 4.2.2.1
nameserver 4.2.2.3
install nscd then restart the service to ensure the DNS cache is flushed.

sudo apt-get install nscd
sudo /etc/init.d/nscd restart

nscd can help if your DNS Servers are slow to respond by caching name information.


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