Re: Networking Problem

Why no


!-------!------------Machine A
Internet-----!Router!
!-------!------------Machine B


That's how mine works.

Steve


"Thomas M" <ReplyToNewsgroup@xxxxxxxxxx> wrote in message
news:eAODzscaGHA.1020@xxxxxxxxxxxxxxxxxxxxxxx
I wasn't sure which group to post this question in, but I thought that this
group was about the closest fit with my problem.

I have two machines on a small home network that share an Internet
connection. I'll refer to these computers as machine A and machine B.
Machine A is running Windows 2000 SP4 and Norton Internet Security 2005
with
the firewall enabled. Machine B is running Windows XP SP2. Here's how
the
network is setup.

Internet > Machine A > Wireless router > Switch > Machine B

This has worked without any problem for about a year. Last week I was
browsing a newsgroup on machine B when the connection got dropped, and I
have not been able to re-establish an Internet connection from machine B
since. However, machine A still connects without a problem via an
internal
DSL modem that is connected directly to the wall jack. The Internet
connection on machine A is shared out.

My first thought was that one of the NICs had gone out. So I tried a
couple
of pings from machine A and found that I could ping machine B and the
router. I then switched to machine B and found that I could ping the
router, but that I was NOT able to ping machine A. This made me think
that
the problem was with the firewall. I disabled the firewall and found that
machine B can ping machine A when the firewall is turned off. However,
machine B still will not connect to the Internet.

Since I can ping between machines, and both machines can access the router
configuration page, it's clear to me that both NICs are working properly.
The fact that I can turn off the firewall and still not be able to connect
machine B to the Internet tells me that it's not a firewall problem.

I then started to focus on the switch and router. First, I bypassed the
switch entirely by connecting machine B directly to the router. This made
no difference. I switched around ports on the router thinking that maybe
a
port had gone bad, but that did not make a different either. I then
cycled
both the switch and the router, and I reset the router configuration to
the
factory defaults. Again, no difference.

Nothing changed on either computer at the time that this problem first
occurred. Neither machine has contracted a virus, I hadn't installed or
removed anything, etc. It seems to have simply broken on the fly. Maybe
a
corrupt driver or something. Short of recreating the Internet connection
and reinstalling Norton Internet Security, both of which I don't want to
do
because they were a pain in the ass to get working the first time, I'm out
of ideas.

Any suggestions that you can offer will be greatly appreciated.

--Tom




.

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