Ubuntu too slow acessing some web sites

[Marco Amador]

I have a web site deployed in windows server 2003 enterprise (http://www.portugalinovador.pt).
I access this site with Windows, Red-Hat, Apple, etc with no problems at all.

When I access with ubuntu (kerner 2.6.25 or 2.6.27) it takes more than half an hour to complete to download the first page.
I test it in several machines with the same network configuration.
I have a machine with ubuntu, kernel 2.6.15 and there are no problems in this machine. I can access the site in seconds.
I disabled ipv6, but the problem persists.

What can I do ?

Thanks.

Marco Amador

[Marco Amador (amador)]

I found some information related to this problem at
http://www.ventanazul.com/webzine/articles/cannot-access-websites-ubuntu-gutsy-gibbon

I followed the instrutions:
1. sudo vi /etc/sysctl.conf

2. add this lines
net.ipv4.tcp_wmem = 4096 16384 131072
net.ipv4.tcp_rmem = 4096 87380 174760

3. execute
sudo sysctl -p

Now it works just fine at my desktop.

The problem is that this site is public so the clients who access this site don't have this solution.

It should be a global fix for this problem.

Thanks.

[chadwik (chadwik)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 89160, so it is being marked as such. Any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.