Re: Only some websites will open - Ubuntu

Big Dave Smith wrote:
On May 31, 4:27 am, The Natural Philosopher <a...@xxx> wrote:
Big Dave Smith wrote:
On May 30, 4:30 pm, The Natural Philosopher <a...@xxx> wrote:
What is bothering me, is that IIRC the Vmware simply connects via the
Linux drivers..so its weird that that works, and the underlying native
stiff does not..
Actually, no, it was not the same IP address. The way I did the
network setup in vmware, the virtual machine is assigned it's own IP
on the network. I believe. I actually reinstalled, since everything
was fresh. An hour and a half later, the same problem, with the same
websites. Slashdot won't load, vmware.com won't load,
toothpastefordinner.com exhibits the curious behavior that I can hit
refresh dozens of times (I'm sure he appreciates me) and slowly load
in a portion of the page.
I have seen this before..but I can't remember why it happened.



Also, I've not noticed any odd behavior with updates or installations,
so those servers seem to be happy.
Mmm.



You ARE running te latest firefox I hope? there was at least one release
that was flakey as hell.
I agree, I do not believe it is a DNS problem. The pages start to
load, I get the title in the title bar, and an icon on some pages, but
that's it. And yes, the pings don't fail lookup. I receive an ip
address for basically whatever I type in.
Right. Its not DNS for sure.

Its not the underlying network low level stuff cos that is independent
of IP address.

I also can't blame firefox, because a fresh Kubuntu install only has
Konqueror, and it has the same problem, even before I install
firefox. Firefox IS the latest stable build, however.
Mmm. I wonder if you have a router/firewall issues that only applies to
the exact IP address that the linux is on?

I will be able to check this later today, but I'm fairly sure that it
is not the issue. I had it as .107 earlier, and after the new install
I'm now .101. Same problems either way.

I have a 'dumb' linux question, for my next idea. I know windows
doesn't complain if I turn it off, jam a new network card in, and turn
it back on. It sets it up and everything. If I do that with Kubuntu,
will it take care of the setup? Just on the odd chance it's my
onboard card, I DO have another downstairs I can plug in and try.
Not sure. I set stuff up and get it working and never touch it unless I
really have to. Ubuntu is supposed to be as plug and play as it gets
though,.

But I do not think this is the problem somehow.

I'm planning on giving this a shot later today, just to see if it
helps. If I can fix it by just plugging in a new PCI Ethernet card
and disabling onboard, I'll let it go. I'll let you know.

Thanks again for all your help, Philosopher. I owe you one. Let me
know if you have further suggestions, please.
Can you tell us what sort of network/router/firewall you have there?

A dump of the "route" command might be good, also "ifconfig -a"

Ok, a few things. Between the computer and the Internet I have a
Linksys RV082 router with basically the default settings. I did have
to change MTU on it to 1460 for the Xbox, and a few ports are
forwarded, name and password changed, etc. That's it. Also, I have
setup no firewall on the Kubuntu machine, unless it comes with one,
which then is setup as default.

You may find changing MTU to 1460 on the liniux will help.

I dislike fragging packets on cheap routers. wirth a try.


david:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:E0:81:51:E1:10
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:
255.255.255.0
inet6 addr: fe80::2e0:81ff:fe51:e110/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:21871 errors:0 dropped:0 overruns:0 frame:0
TX packets:7267 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:12844595 (12.2 MiB) TX bytes:743377 (725.9 KiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

david:~$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref
Use Iface
192.168.1.0 * 255.255.255.0 U 0 0
0 eth0
link-local * 255.255.0.0 U 1000 0
0 eth0

I haven;pt got a link-local in my routing table. No idea what it means..

default bigdave.local 0.0.0.0 UG 0 0
0 eth0


I assume bigdave.local is the linksys..

Lastly, as another user suggested, I did a curl -v slashdot.org, which
prints out the HTML content of the page up to only a certain point
each time...

<h4>
Sections
</h4>
</div>
<div class="content" id="links-sections-content">
<ul>

And then it stops. I'm not sure if this is the way curl works, or if
it's significant that it's stopping after X number of lines, or at the
same point each time, or what.

Hmm.

I remembered what got buggered up in my setup.
One site just hung on me..

I rebooted my D-link router..after talking to the support desk on that site (expensive commercial site I subscribe to)

They recommended an upgrade to the router firmware.

As far as I could tell, it was something in the NAT getting messed up. Its simply stopped forwarding packets to me. On an address by address basis.

So try that at least..it may simply be timing out its TCP translation tables.


If that fixes it, you know its a router issue. Or an interaction between Linux and the router..so you can tweak the parameters and see what works.

It really might be something like the MTU being set awry..I know we used to fix flakey ethernets in the old days by using 512byte MTUS. The theory being if you used something that every link in the chain didn't need to fragment, you probably would avoid any silliness.




Thanks again to everyone. I hope we're getting closer!
-Dave

.

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