Re: Cannot access some websites
From: Arie (arie_news_at_systemssolutions.ca)
Date: 01/05/05
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Date: Wed, 5 Jan 2005 02:45:58 -0500
Hi Robert;
I'm experiencing a similar problem in that I am all of a sudden unable to
connect to some web sites, or I am unable to see all the content of a web
page (missing banners, missing icons or graphics). I have found a temporary
workaround and that is by specifying a public proxy server in my IE6.0
connection settings. Then all web sites come up just fine, this proves that
my web browser is working fine. Using a public proxy server for reliable
HTTP access is not a good option for me as my other HTTP dependent programes
will not operate through a proxy, or perform slugish through a proxy.
As soon as I turn the proxy server off, surfing web sites yields missing
content (icons, banners, pop-ups display "cannot be found" messages).
For example, ebay.com will come up, but without any of the banners or
addvertisments. With the proxy server, all banners and advertisements work
fine. I right clicked the properties of one of these baners and found out
that ALL ebay's banners come from a site called ebay.doubleclick.net so when
I turn the public proxy back on, I can go to doubleclick.net just fine,
without the public proxy setting, I get "page cannot be displayed". Similar
scenario with lycos.com and my inability to view banners on lycos.com that
are hosted by network.realmedia.com
Another test is when I ping this site (http://doubleclick.net or
http://network.realmedia.com) I get a reply from 127.0.0.1 (my local IP) but
if I ping the actual IP address for doubleclick.net then I get a proper
reply from 216.73.92.112. (see attached ping results). So why is the DNS
for doubleclick.net and network.realmedia.com and other web sites resolving
to my local IP and not the correct IP?
It looked like a DNS issue of my ISP. But I have the advantage to a house
with 4 computers to test with and my XP Home and W2K computers connected to
this SAME D-Link router are working fine! only my 2 XP Pro machines share
this same problem.
I have tried another NIC,
re-installed NIC drivers,
flushed DNS cache,
tried specifying static DNS servers instead of dynamic
tried static IP and dynamic IP.
tried alternate DNS servers (publicly available and private)
nothing works!
The closest I have come to an answer to my question is in your response to
AHT, but your advice to him does not directly apply to this scenario.
I checked chicagotech.net and could not find a scenario like mine their
either.
Any help or direction you can lend would be greatly appreciated!
Thanks
Arie
"Robert L [MS-MVP]" <noreply@hotmail.com> wrote in message
news:%23Fwj10a8EHA.1408@TK2MSFTNGP10.phx.gbl...
> it couls be mtu issue. quoted from http://www.ChicagoTech.net
> Can't access some web sitesSymptoms: 1) If you're using MS ICS or Windows
> server as router to access the Internet, your clients may not be able to
> access certain web sites. However, the ICS host or the server doesn't have
> this problem.
> 2) After installed a new router or cable modem replacing dial-up to access
> the Internet, you can't access some web sites.
> 3) You also find that most web sites you can't access are block to ping or
> they are security sites using HTTPS.
>
> Causes: 1) The problem occurs because many web servers block ICMP messages
> and the packets are dropped. As a result, the requested web site doesn't
> load.
> 2) This problem is caused also by an incompatible MTU networking setting.
> You may try to install the latest SP. If you use MS ICS, you may want to
> configure all your Client computers to use the new, lower MTU as the
> default
> for all Internet communication. To modify the MTU size, locate the
> following
> registry key: HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Services\
> Tcpip\ Parameters\ Interfaces. If you use a router like Cisco DSL Router,
> you may want to adjusting the PPPoE MTU Size. For example, to adjusting
> the
> PPPoE MTU Size on the Cisco DSL Router, do
>
> interface ethernet0
> no shut
> ip address <ip address> <subnet mask>
> ip adjust-mss 1452
> --
> For more and other information, go to http://www.ChicagoTech.net
>
>
> Don't send e-mail or reply to me except you need consulting services.
> Posting on MS newsgroup will benefit all readers and you may get more
> help.
>
> Bob Lin, MS-MVP, MCSE & CNE
> Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on
> http://www.ChicagoTech.net
> Networking Solutions, http://www.chicagotech.net/networksolutions.htm
> VPN Solutions, http://www.chicagotech.net/vpnsolutions.htm
> VPN Process and Error Analysis,
> http://www.chicagotech.net/VPN%20process.htm
> VPN Troubleshooting, http://www.chicagotech.net/vpn.htm
> This posting is provided "AS IS" with no warranties.
> "Ashish Thakkar" <romancingwithlife@fastmail.fm> wrote in message
> news:22419c20.0501030230.2e9cbcff@posting.google.com...
>> Hi,
>>
>> I am not able to visit some websites thru my cable connection.
>>
>> Earlier i cudnt visit my bank's website and one of my personal
>> website(i cant even check its email on outlook express).
>> I can however view this website thru google translate.
>>
>> Then again i cud not login to my clients FTP.
>>
>> After some days now i can access my bank's website but cant get to
>> yahoo mail main page - http://mail.yahoo.com (i can open
>> www.yahoo.com)
>>
>> I get page cannot be displayed.
>>
>> Please help.I have absolutely no clue why this is happening.
>>
>>
>> Regards,
>> AHT
>
>
begin 666 ping.txt
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;-RXP+C N,5T-"@T*5')A8V4@8V]M<&QE=&4N
`
end
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