Internet Connection Problems

  • Thread starter Thread starter Jules
  • Start date Start date
J

Jules

Here's what we have:

- 3 machines running Windows 2000 (most recent updates)
- peer-to-peer network connected via a HUB
- network is setup via TCP/IP - one machine has an IP
address assigned. The other two are set to obtain IPs
automatically
- the machine with the assigned IP is connected to the
internet via a USB DSL modem and acts as a gateway for the
other two machines to access the internet

Here's the problem:

The ICS host machine can surf to all websites with no
problem, receive email, etc. All internet services
function properly. The other two machines can access email
with no problem, but cannot surf to certain websites. The
ones we've found so far are:

www.walmart.com
www.ae.com
www.gap.com
www.ebay.com
and the secured section of a credit card site

The machines can surf to similar sites such as target.com
and amazon.com

We initially believed the problem might be related to
Norton Internet Security software which was installed on
all three machines. However, the host machine has a brand
new hard drive on which Int Sec has never been installed,
and an external laptop (on which Int Sec has never been
installed) hooked up to the network had the same problems.

Everyone we've talked to about this is stumped. We've
tried changing all the security settings in IE, etc.

Please help!

Thanks
 
have you tried checking windows firewalling? some parts of the internet use
non standard ports
Image by FlamingText.com
Jules said:
Here's what we have:

- 3 machines running Windows 2000 (most recent updates)
- peer-to-peer network connected via a HUB
- network is setup via TCP/IP - one machine has an IP
address assigned. The other two are set to obtain IPs
automatically
- the machine with the assigned IP is connected to the
internet via a USB DSL modem and acts as a gateway for the
other two machines to access the internet

Here's the problem:

The ICS host machine can surf to all websites with no
problem, receive email, etc. All internet services
function properly. The other two machines can access email
with no problem, but cannot surf to certain websites. The
ones we've found so far are:

www.walmart.com
www.ae.com
www.gap.com
www.ebay.com
and the secured section of a credit card site

The machines can surf to similar sites such as target.com
and amazon.com

We initially believed the problem might be related to
Norton Internet Security software which was installed on
all three machines. However, the host machine has a brand
new hard drive on which Int Sec has never been installed,
and an external laptop (on which Int Sec has never been
installed) hooked up to the network had the same problems.

Everyone we've talked to about this is stumped. We've
tried changing all the security settings in IE, etc.

Please help!

Thanks
Click to expand...


---
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Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.547 / Virus Database: 340 - Release Date: 2/12/2003
 
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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This posting is provided "AS IS" with no warranties.
 
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