Re: Accessing secure websites over LAN

From: Robert L [MS-MVP] (noreply_at_hotmail.com)
Date: 05/13/04 

Date: Thu, 13 May 2004 10:30:35 -0500

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.
Robert Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN, Anti-Virus, Tips & Troubleshooting on 
http://www.ChicagoTech.net
This posting is provided "AS IS" with no warranties.
"Pierre van Rooyen" <pierrevr@webmail.co.za> wrote in message 
news:27b63fdb.0405130541.2fa5761f@posting.google.com...
>I have the following problem.  Every time I try to access an secure
> website or a page with secure items the browser tries endlessly to
> connect to the page/item but with no avail.  No error message is ever
> returned.  This only happens when I try to access these sites as a
> client computer on a LAN with shared Internet connection.  I have no
> problem accessing the secure websites using the host computer.  I also
> changed the client computer to host and
> that enabled me to access secure sites.  I should also mention a
> secure site/item is always the cause for my browser's inability to
> connect to a site, that there are some secure sites that I can access
> (althought it seems if it happens at a slower speed).
>
> I didn't have this problem when I used to connect to the Internet
> using a dail-up connection.  The problem started when I installed my
> broadband wireless connection.  As a novice I am not sure which
> protocol the wireless connection use but I have noticed settings for
> PAP, MPAP, CHAP and that type of stuff that is different from the
> dialup connection.
>
> I have tried a range of options to resolve the issue including:
> - Changing/disabling the firewall on client and host computer
> - Reinstalling Windows XP on both client and host computer
> - Trying different browsers
> - Toggling with SSL and encrypting settings
> - Toggling with the IPSec policies and even removing it with "net stop
> policyagent"
>
> Please feel free to forward this message to anyone/any newsgroup that
> you think might be better able to assist.
>
> Thanks in advance
>
> Pierre

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