Had the same problem with slowness with a clean install of SUSE 10.0. A previous install of 9.3 did not have this problem, so I figured out what the differences were, and disabling IPV6 DNS resolution sped up my response time.

I used the same fix for Firefox that Broch gave...
For Konqueror (and all other KDE apps), you can disable IPV6 in the sysconfig editor.

# yast2 sysconfig

Then expand the tree and change the varable:

Desktop/KDE_USE_IPV6=no

To disable IPV6 on hardware, also look for this variable in the tree:

Network/Hardware/Config/USE_IPV6=no

If you don't see it, (probably won't), then save the changes youv'e already made and close the sysconfig editor. Then add this to the end of your /etc/sysconfig/network/config file:
Now restart the sysconfig editor and look for the USE_IPV6 variable in the tree and change it to "no" and save. Reboot.

Hello all. I kinda have the same problem and think this might be a good place to put it. I have a DSL connection to the internet through a dsl modem/router. I did what was suggeted earlier in the post for getting firefox to work. Everything else on the system that has anything to with internet does not work. When I try to use the check for update feature in suse it says failed to connect, when I try to use xmms to connect to a shoutcast stream it looks like it dont even try to connect. I am using suse 10.0 from a network install (all went fine during that). ifconfig does not show loopback on. here is the output from ifconfig:

linux:/home/gotchya # ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:11:5B6:B4:69
inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1
RX packets:526 errors:0 dropped:0 overruns:0 frame:0
TX packets:530 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:466058 (455.1 Kb) TX bytes:88585 (86.5 Kb)
Interrupt:11 Base address:0xe400

linux:/home/gotchya # ifconfig eth0 lo up
lo: Unknown host
ifconfig: `--help' gives usage information.
linux:/home/gotchya #

anyone have any ideas? I am trying suse stand alone on this system and all else seems well. I have tried just about everything in this post.
Thanks in advance for the help!

Hey anti,

Have you tried the YaST sysconfig settings I just posted?

Desktop/KDE_USE_IPV6=no
Network/Hardware/Config/USE_IPV6=no

I have used them on four different boxes all running SUSE 10.0 with success. If you've already got Firefox working, then try disabling IPV6 on KDE and test with Konqueror.

Also, about your commands below...
I'm a little curious about your MTU setting at 1450. Is there any reason it's not the default 1500? Perhaps you have a VPN client or are using PPPoE with your DSL connection? If so, then these are possibly issues.

The second command does exactly the same thing for me. Typo? Try ifconfig without any parameters, and post the output here.

BTW, here's the reference for one of my sources for information that I was unable to post before due to forum restrictions:

Hull Linux User Group - Suse 9.2: Disabling IPV6 made my system "snappier
http://www.thisishull.net/showthread.php?t=78494

disabling ipv6 in kernel eliminates steps with KDE or individual apps. So modprobe modification is easier.

What is ipv6 exactly is?

Internet Protocol version 6. As ooposed to IPv4 which is the standard currently.
http://www.ipv6.org/