Re: help with network problem

From: Irene (xie@proexam.org)
Date: 09/13/02 

Date: 13 Sep 2002 18:05:19 -0000
From: Irene <xie@proexam.org>
To: security-basics@securityfocus.com
('binary' encoding is not supported, stored as-is) In-Reply-To: <JIEPJGFPFMFIGBNCPKGGMEMCCOAA.bstrauss3@attbi.com>

Thank you Burton.I tried to reload the page again and again and I also
tried the reboot magic, no different. :(

It is not a https site. no SSL involved. It is just a bbs site. Currently
I have to use telnet to get into the site. When I tried telnet xxx.xxx.xxx
80, it said connection lost. Seems the http port only closed on this
machine. I can browser the site using http in all the other computers.

Frustrated. :(

Any more suggestions?

Irene

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>From: "Burton M. Strauss III" <bstrauss3@attbi.com>
>To: <security-basics@securityfocus.com>
>Cc: "Irene" <xie@proexam.org>
>Subject: RE: help with network problem
>Date: Fri, 13 Sep 2002 10:46:37 -0500
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>While ping serves to test tcp/ip connectivity (is there a machine there?),
>it doesn't mean that the web server is up, nor answering queries, etc.
>
>However, if you can ping the server from home and can ping & browse from
>other sites, then it's probably not a tcp/ip problem.
>
>The next likely suspect is the browser. I have seen similar problems with
>IE6, where there appear to be some case(s) where the handshake setting up
>the session doesn't work.
>
> * Try pressing the STOP button and then ENTER. For me, this often makes
>it work, but no clue why.
>
> * Try closing the browser (ALL open sessions) and restarting - it
appears
>that negative information (e.g. page not available) is cached... so once
it
>fails, it's failed until the cache entry expires.
>
>If this is an https:// site, there is also a (little used) ssl option
called
>TLS. Some of the implementations and servers have problems with it. Try
>turning it off (Tools | Internet Options | Advanced -- then search
for "Use
>TLS v1".
>
>-----Burton
>
>
>Some background... Web and ping actually are very different protocols --
>see this (http://www.freesoft.org/CIE/Topics/81.htm) for some background.
>
>"Internet Control Message Protocol (ICMP), documented in RFC 792, is a
>required protocol tightly integrated with IP. ICMP messages, delivered in
IP
>packets, are used for out-of-band messages related to network operation or
>mis-operation. Of course, since ICMP uses IP, ICMP packet delivery is
>unreliable, so hosts can't count on receiving ICMP packets for any network
>problem."
>
>
>
>
>
>
>
>
>On Thursday 12 September 2002 02:24 pm, Irene wrote:
>> Hi,
>>
>> Recently, I have found that I am not able to browser one website at
home.
>> ( Only that website so far). I am able to ping it and got reply really
>> fast, but when I use IE to browser it, it just keeps going and going and
>> never stops. No even general "page not found" error message. I can
access
>> that website in some other places. The other computers on the same LAN
can
>> access that website. I tried to put ip address instead of domain name,
but
>> it doesnt make any difference. I have updated my IE to IE6 and put all
the
>> patches and checked all the options in advance options. Doesnt help. I
>> dont know what to do with it. I do can telnet to that site though.
>>
>> Does anyone have a clue? Isnt it weird?
>>
>> Thank you for the help in advance.
>>
>> Irene
>
>--
>----------
>Matt Hemingway
>matt.hemingway@pcnalert.com
>http://www.pcnalert.com
>626-585-2788 x136
>----------
>
>