Re: ICS on small home network no longer works for http traffic

From: Robert L [MS-MVP] (noreply_at_hotmail.com)
Date: 03/16/04 

Date: Tue, 16 Mar 2004 10:00:22 -0600

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 

-- 
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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.
"Jason Blake" <anonymous@discussions.microsoft.com> wrote in message 
news:B23ECACB-DAFC-40DC-AC19-EA3F09931F4B@microsoft.com...
> ICS small home network no longer works for http browsing just comes up 
> with page not found message after a timeout period is reached. . Both XP 
> PCs with all the latest updates and service packs. The  dhcp aspect is 
> working fine. The client PC can ping to a outside IP, or a name and DNS 
> resolves the name ok.  FRom the clients browser I can go go an ftp site 
> ok.   IT seems to be all http traffic from the client does now work. I 
> have tried disabling and renabling the shared LAn connection releasing and 
> renewing the ip config etc. Ive checked the security settings in the 
> browser properties and all seems ok. The functionality of the ICS host is 
> fine. Anyone any ideas ?
>

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