Re: IE & Router problem

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Norman,

The D-link router is an integral router and DSL modem. ISP requires PPPOA
which is what i have the router configured to.

Thanks for your thoughts on the topic. I will keep digging; there must be a
logical solution somewhere.



"NormanM" wrote:

On Mon, 25 Jun 2007 12:16:00 -0700, Paul W wrote:

"NormanM" wrote:

On Sun, 24 Jun 2007 10:32:00 -0700, Paul W wrote:

I am running Windows XP SP2, IE6, and have been accessing my Internet ISP by
a simple (ISP supplied) ADSL modem. I have switched to a D-Link router and
now find that i cannot send email (but recieve ok) due to 'host unexepectedly
terminated the connection' error. I am also finding it very slow accessing
specific web sites. I have checked configs and applied latest router updates;
no difference.
I have borrowed a NetGear router from a friend; it gives me the same
problem. I have connected a laptop running Win2k to both routers; the laptop
works fine with both routers.
If i switch the XP PC the back to the modem, all works fine again.
My conclusion is that i some sort of conflict in the PC that is interfering
with the router operation, but what? Any ideas?
NB: I have used TCPOptimiser to check MTUs - via router or moden it gives me
the same information - max size setting of 1458.

It might help to know your connection type: Cable, or DSL? There should be
no conflict between MSIE and a router; thousands have hooked things up this
way over the years. There *could* be an issue with certain specific
configurations, such as "cascaded NAT", which happens with some DSL modems,
which are actually combination modem/router units.

My connection is via an ADSL, and both routers are combined ADSL modem/routers.

I agree its an odd problem. Talking to router suppliers and my ISP has not
given any clues, but something is clearly wrong. My analysis suggests the
problem lies within IE on my PC, but happy to proved wrong. Is there any
basic difference between the way IE communicates to an ISP directly via modem
or via a router/modem path?

There is no difference in the behavior of MSIE between a router, and a
direct modem connection. Browser issues HTTP commands to an IP address,
server at that IP address responds. The router *should* transparent to MSIE.

Also looked at NAT options in both my router - only one option:
enable/disable NAT. If i disable, all connectivity to the internet is lost.

Of course. NAT translates both IP address and port number between the WAN
and the LAN. MSIE issues an HTTP GET command to www.example.com. MSIE does a
DNS lookup on www.example.com, finds it at 11.22.33.44, sends the GET
command to 11.22.33.44 from local port 1234. Router puts LAN IP address and
port 1234 into it NAT table, and sends th GET packet on its way to
11.22.33.44 from it port 1536. Server sends a response to your public IP
address at port 1536, your router looks up the destination in its NAT table,
and forwards the response to your LAN IP address at port 1234. As I said,
that process should be transparent to MSIE.

I can't think of anything in MSIE that would choke with a router, but work
without one.

Are you running the D-Link router *and* a DSL modem? Does your ISP require
PPPoE?

--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum

.

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