What may be the cause?

Hi, yesterday a have a smalll problem with my internet connection. It
goes like that: some pages, for example google, works fine but others,
like distrowatch,slashdot, yahoo did not open. Also i was able to open
a FTP connection, but the instant messeging programs like
ymess,trilian, gtalk did not connect. I talk to my provider and they
say that the problem is that some pages have small fragmentation and
some have big fragmentation and only the pages with small fragmentation
will work. Also they say that i should talk with the company that
transport the net from the provider to my workplace. When a send ping
to the gateway with a size 4000 bytes some packages are lost ..... Any
explanation for this behavior? Some links where i can find more?

This is my firs topic so please excuse any error, english is not my
native language

"Andi" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com

> Hi, yesterday a have a smalll problem with my internet connection. It
> goes like that: some pages, for example google, works fine but others,
> like distrowatch,slashdot, yahoo did not open. Also i was able to open
> a FTP connection, but the instant messeging programs like
> ymess,trilian, gtalk did not connect. I talk to my provider and they
> say that the problem is that some pages have small fragmentation and
> some have big fragmentation and only the pages with small
> fragmentation will work. Also they say that i should talk with the
> company that transport the net from the provider to my workplace.
> When a send ping to the gateway with a size 4000 bytes some packages
> are lost ..... Any explanation for this behavior? Some links where i
> can find more?

"man ifconfig" to see how to set the Maximum Transmission Unit MTU = 1524 or
so.

> "man ifconfig" to see how to set the Maximum Transmission Unit MTU = 1524 or
> so.


UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:360314763 errors:0 dropped:0 overruns:0 frame:0
TX packets:357150683 errors:0 dropped:0 overruns:0 carrier:0

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~
something wrong?

What caused the problem and where cand i find more about this?

"Andi" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com

>> "man ifconfig" to see how to set the Maximum Transmission Unit MTU =
>> 1524 or so.
>
>
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:360314763 errors:0 dropped:0 overruns:0 frame:0
> TX packets:357150683 errors:0 dropped:0 overruns:0 carrier:0
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~
> something wrong?
>
> What caused the problem and where cand i find more about this?

There is no apparent problem other than anecdotal.

> There is no apparent problem other than anecdotal.

sorry, i just want to find out more about this incident.... and what
caused him.... why some pages work and others don't.....why ANY of the
ymess,gtalk,trilian won't connect.... is anything that causes this
behavior? And if there is a cause, where can a reed more about it?

"Andi" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com

> sorry, i just want to find out more about this incident.... and what
> caused him.... why some pages work and others don't.....why ANY of the
> ymess,gtalk,trilian won't connect.... is anything that causes this
> behavior? And if there is a cause, where can a reed more about it?

Check your firewall is the only thing that suggests itself , e.g. "related,
established" inbound.

Andi wrote:
>> There is no apparent problem other than anecdotal.
>
> sorry, i just want to find out more about this incident.... and what
> caused him.... why some pages work and others don't.....why ANY of the
> ymess,gtalk,trilian won't connect.... is anything that causes this
> behavior? And if there is a cause, where can a reed more about it?
>


Perhaps a beer truck hit a telephone pole? Or a ground crew cut a
cable? Or a communications manhole got flooded?

All/any of these can cause what you see....

--Yan

Andi <(E-Mail Removed)> wrote:
>> There is no apparent problem other than anecdotal.
>
> sorry, i just want to find out more about this incident.... and what
> caused him.... why some pages work and others don't.....why ANY of the
> ymess,gtalk,trilian won't connect.... is anything that causes this
> behavior? And if there is a cause, where can a reed more about it?

If the problem you described occured on just one day, then it might
have been caused by misconfigured router somewhere in your provider's
network, or even further upstream. If somebody disabled ICMP messages
which are used in Path MTU Discovery, then you might have problems with
some web sites, but not with others. If your problem is not temporary,
then start with checking your router's config.

--
andrei