can't reach internet

[NoOp]

On 08/13/2007 03:05 AM, Mirco Bertossi wrote:
> 2007/8/13, Marcelino Luna <marce34 at gmail.com>:
>> Mirco Bertossi escribió:
>> > HI folks,
>> > I have a problem with a new aspire 5671 laptop. I installed festy, and
>> > more or less everything goes on, but the network cards. Both them
>> > seems to work, but when I start firefox or synaptic they simply can't
>> > go out. Well not exactly: for example I can load www.google.com and
>> > related, so I can read my post but I can't write.
>> > I tried nslookup: works
>> > ping to whatever you want: works
>> > telnet www.site.com 80: works
>> > My net is composed by a router, a netgear wg602 a.p. that give me the
>> > wireless connection. I have another pc that works perfectly though the
>> > same router, so I don't thing could be a router problem. What can I
>> > do?
>>
>> I had the same problem. Try adding the following to /etc/sysctl.conf and
>> restarting:
>>
>> net.ipv4.tcp_wmem = 4096 16384 131072
>> net.ipv4.tcp_rmem = 4096 87380 174760
>>
>> And here goes the explanation: http://lwn.net/Articles/92727/   though
>> it seems the solution
>> given in this URL doesn't work in Ubuntu.
> Hi Marcelino, i tried your solution and IT WORKS!!! Great, thank you a
> lot! I didn't understand what went wrong, and I still don't know, but
> now I can surf. Fantastic!
> 

I'd also recommend that you check and set your MTU to match your router.
Here are a few helpful links:

http://www.dslreports.com/faq/695
https://answers.launchpad.net/ubuntu/+source/network-manager/+question/4630