not able to connect to random webpages

wookieface · 06-19-2007, 09:16 AM

This is a continuation of this thread

Quote:

Hi, i'm having a weird problem.
I'm not able to connect to kde-look.org[/url] , and pages that resemble that one (beryl-themes.org and gnome-look.org) i've tried with different browsers, but all i get is the "server not found" message. I'm able to visit other pages, and i'm running openSUSE 10.2.

Apparently it's not a dns problem, as i'm not even able to connect to the pages using the ip instead of dns.

After i updated my system, (updating all packages with smart) i thought that the problem was gone, but it turned out that it was still there, but with some other pages (not kde-look anymore), that looks like they have been "choosen" randomly.

Here's what slowcoder said in his last post:

Quote:

Originally Posted by SlowCoder

While I have a pretty good knowledge of networking (I think), I'm not the best in Linux, yet, but I'm working on it. Based on everything I've seen so far, I can't find a culprit.

Here's what I know about your setup:
1. It's not DNS, because your attempts to access via IP failed.
2. Your netmask, gateway, IP appear to be ok, for a home router setup.
3. Your hosts* files don't seem to have any conflicting entries. You may want to research this more, as I don't know a whole lot about them. But if they're unmodified they shouldn't be a problem.

Here are some other things for you to look into:
1. Firewall problem? Have you configured any sort of firewalling on your Linux box, or restricted sites on your router?
2. I noticed that your Linux reports a different IP than your Windows. If your router has been set up to restrict access from inside to only a certain range of IPs ...

Other than this ... I think I've exhausted my brainpower. Hopefully someone else will be able to chime in ...

Maybe repost in the networking section?

auxsvr · 06-19-2007, 10:35 AM

How long has this been happening? Maybe your DNS server or internet connection is having problems. Do you spend more time in linux than in windows?

nx5000 · 06-19-2007, 11:18 AM

Burn the last knoppix and try (so that you need to check with another kernel)
What kernel are you using
What NIC are you using

Stupid ideas I would try
change the mtu
change the ttl

Run a sniffer

wookieface · 06-19-2007, 01:53 PM

Quote:

Originally Posted by auxsvr

How long has this been happening? Maybe your DNS server or internet connection is having problems. Do you spend more time in linux than in windows?

As i already pointed out, it's not a dns error, because it doesn't even work when I'm connecting to it via the ip.
It doesn't happen in windows, nor in other distros than opensuse.

Quote:

Originally Posted by nx5000

Burn the last knoppix and try (so that you need to check with another kernel)
What kernel are you using
What NIC are you using

Stupid ideas I would try
change the mtu
change the ttl

Run a sniffer

I'm using a 2.6.18.8-0.1-default opensuse kernel.
my NIC is a "Micro-Star International VT6105 [Rhine-III]" (or that's at least what yast tells me.)
And i have tryed with both windows and other linux distros, and they all work.

I will try the "stupid ideas" that you suggested, later

.

nx5000 · 06-19-2007, 04:50 PM

Ah! I didn't see that other distro worked.

Quote:

Originally Posted by wookieface

I will try the "stupid ideas" that you suggested, later

.

I think it's not needed. It seems to be your kernel..

You could copy another kernel (say 2.6.19 or higher) to your suse.
Copy /boot/vmlinuz and /lib/modules/linux-2.6.19 from another distro to your /
Then modify your grub to add an entry for this kernel (don't remove any files from suse, not even the grub lines pointing to 2.6.18)

And see if it changes something. That would give an idea. Quite strange that it happens only on some websites.. (I know that some kernels around this version got a regression and the consequence was that some people could not connect to some remote hosts.. can't find the changelog line among the thousands..)

Then I don't know how you can do it permanently. Suse adds a lot of patches to their kernel (which are needed probably..) so you should better submit a bug to their bugzilla.

wookieface · 06-22-2007, 02:17 AM

Quote:

Originally Posted by nx5000

Ah! I didn't see that other distro worked.

I think it's not needed. It seems to be your kernel..

You could copy another kernel (say 2.6.19 or higher) to your suse.
Copy /boot/vmlinuz and /lib/modules/linux-2.6.19 from another distro to your /
Then modify your grub to add an entry for this kernel (don't remove any files from suse, not even the grub lines pointing to 2.6.18)

And see if it changes something. That would give an idea. Quite strange that it happens only on some websites.. (I know that some kernels around this version got a regression and the consequence was that some people could not connect to some remote hosts.. can't find the changelog line among the thousands..)

Then I don't know how you can do it permanently. Suse adds a lot of patches to their kernel (which are needed probably..) so you should better submit a bug to their bugzilla.

It is indeed my kernel. I updated it, and for now, it seems to be working. But if it happens again, i will submit a bug report to suse.