Bug 237421

Summary:	Internet extremely slow
Product:	[openSUSE] openSUSE 10.2	Reporter:	Frank Buschlinger <frank.buschlinger>
Component:	Network	Assignee:	Karsten Keil <karsten.keil>
Status:	RESOLVED DUPLICATE	QA Contact:	E-mail List <qa-bugs>
Severity:	Normal
Priority:	P5 - None
Version:	Final
Target Milestone:	---
Hardware:	i386
OS:	Other
Whiteboard:
Found By:	Customer	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Attachments:	var/log/messages file as requested

Description Frank Buschlinger 2007-01-22 17:23:51 UTC

Internet access is very slow or impossible. E.g. when trying to display www.opensuse.org in a browser (Konqueror, Firefox), the page would not completely load. Also other pages do not load completely. File downloads stop very quickly. It makes 10.2 un-usable for me. The problem does not occur on 10.1 installations. However, I have not found similar reports on the internet (except re ipv6, deactivation, did not help), therefore I am not sure whether it is a bug or configuration problem. Nameserver/Gateway was checked for correct settings.

Comment 1 Matej Horvath 2007-01-24 16:05:45 UTC

Please attach your /var/log/messages.

Comment 2 Frank Buschlinger 2007-01-25 07:08:31 UTC

Created attachment 114867 [details]
var/log/messages file as requested

Comment 3 Cyril Hrubis 2007-01-26 18:31:08 UTC

Perhaps this can be related with this:

https://bugzilla.novell.com/show_bug.cgi?id=228039

Comment 4 Frank Buschlinger 2007-01-29 09:22:37 UTC

(In reply to comment #3)
> Perhaps this can be related with this:
> 
> https://bugzilla.novell.com/show_bug.cgi?id=228039
> 
There may be a relation. I tried to browse using IP addresses rather than URLs and this worked better though not perfectly. The referenced bug report is for 10.1. I have however no problems in 10.1 but in 10.2.

Comment 5 Greg Kroah-Hartman 2007-01-31 17:58:52 UTC

Are you using ipv6 here?

Comment 7 Frank Buschlinger 2007-02-01 09:06:58 UTC

I updated the following settings:

- Firefox: set network.dns.disableIPv6 from false to true
- KDE: YaST2 /etc/sysconfig editor, set KDE_USE_IPV6 from "yes" to "no"

Unfortunately, this did not resolve the problem.

Comment 10 Karsten Keil 2007-02-07 15:13:15 UTC

Can you please try if
echo "0" > /proc/sys/net/ipv4/tcp_window_scaling
works ?

Comment 11 Frank Buschlinger 2007-02-08 14:53:26 UTC

having issued the suggested command, internet seems to work fine now. Thanks for your help. It would be nice if you could tell me what the command actually did and why it was necessary to issue it.

Comment 12 Karsten Keil 2007-02-08 17:34:33 UTC

The problem is, that some gateway/firewall/router between you and the internet sites does not implement TCP/IP correctely. It do not understand the window scaling option, but accept the establish of a connection with window scaling.
Then it drops packets which do not fit into the window without the window scale factor. The following article give some info, a more complete discussion is in the duplicate bug.
http://en.opensuse.org/SDB:Problem_with_establishing_TCP/IP_connection_in_openSUSE_10.2

*** This bug has been marked as a duplicate of bug 229848 ***