home networking problem

[Cory]

Im having a problem with my home network and I cant for the life of me
figure it out. Here is the set up:


PC2-------Linksys NR041 Router-----PC1-----Cable Modem


First off I am doing this so PC1 can have faster transfer speeds by avoiding
using NAT. I have single outside global IP address dynamically assigned to
PC1. PC1 has two ethernet cards, one connecting to the modem the other
connected to the router. The IP's for the NIC's directly connected to the
router have statically assigned ip addresses in the 192.168.1.0 network.
Both PC's belong to the same workgroup, and in fact can communicate with
each other just fine. PC1 can acces the internet just fine, PC2 cannot.

PC1 is set up as a computer that connects directly to the internet and has
computers connect through it.
PC2 is set up as a computer that connects to the internet via a residental
gateway.
The router is set up as a 'router' not a 'gateway' as are the options.
Changing it to a gateway seemingly has no effect.

I believe the problem is that there is no route, default or otherwise in the
router to forward traffic to the modem. Any static route I put in doesnt
seem to work.

The NIC on PC2 has an IP address of 192.168.1.74 /24
The NIC on PC1 has an IP address of 192.168.1.75 /24 (connects to the
router)
The NIC on PC1 has an IP address of xxx.xxx.xxx.xxx (connects to the
internet)
The router has an IP address of 192.168.1.1 /24

Pings from PC1 will hit every address in the network.
Pings from PC2 can hit every address but the xxx.xxx.xxx.xxx network.

Any ideas?

 

[johnsuth]

Im having a problem with my home network and I cant for the life of me
figure it out. Here is the set up:


PC2-------Linksys NR041 Router-----PC1-----Cable Modem


First off I am doing this so PC1 can have faster transfer speeds by avoiding
using NAT. I have single outside global IP address dynamically assigned to
PC1. PC1 has two ethernet cards, one connecting to the modem the other
connected to the router. The IP's for the NIC's directly connected to the
router have statically assigned ip addresses in the 192.168.1.0 network.
Both PC's belong to the same workgroup, and in fact can communicate with
each other just fine. PC1 can acces the internet just fine, PC2 cannot.

PC1 is set up as a computer that connects directly to the internet and has
computers connect through it.
PC2 is set up as a computer that connects to the internet via a residental
gateway.
The router is set up as a 'router' not a 'gateway' as are the options.
Changing it to a gateway seemingly has no effect.

I believe the problem is that there is no route, default or otherwise in the
router to forward traffic to the modem. Any static route I put in doesnt
seem to work.

The NIC on PC2 has an IP address of 192.168.1.74 /24
The NIC on PC1 has an IP address of 192.168.1.75 /24 (connects to the
router)
The NIC on PC1 has an IP address of xxx.xxx.xxx.xxx (connects to the
internet)
The router has an IP address of 192.168.1.1 /24

Pings from PC1 will hit every address in the network.
Pings from PC2 can hit every address but the xxx.xxx.xxx.xxx network.

Any ideas?

In the absence of any other replies, I will wade in over my head here
just for fun.

On the one hand your descriptions are lucid. On the other hand you seem
grossly confused about the workings of TCP/IP.

It is not clear whether there are other boxes on the LAN, but if there
are not then your router is a waste of space; you could replace it with
a hub or just plug PC1 directly into PC2 with a crossover cable.

Then it will be clear that your problem is in the settings for PC2.

 

[Ben Cottrell]

Im having a problem with my home network and I cant for the life of me
figure it out. Here is the set up:


PC2-------Linksys NR041 Router-----PC1-----Cable Modem

I don't understand why you have done this.. The point of a Router is
that you connect the cable modem to the router, and let it share the
internet connection. Otherwise, as the other poster mentioned, you may
aswell not even have a Router.

First off I am doing this so PC1 can have faster transfer speeds by avoiding
using NAT.

I'm not sure what you're trying to achieve.. your transfer speeds will
not be affected by using NAT. If you have experienced a loss in
transfer speeds with NAT then something else is poorly configured.

I have single outside global IP address dynamically assigned to
PC1. PC1 has two ethernet cards, one connecting to the modem the other
connected to the router. The IP's for the NIC's directly connected to the
router have statically assigned ip addresses in the 192.168.1.0 network.
Both PC's belong to the same workgroup, and in fact can communicate with
each other just fine. PC1 can acces the internet just fine, PC2 cannot.

This shows that the network is functioning properly.

PC1 is set up as a computer that connects directly to the internet and has
computers connect through it.
PC2 is set up as a computer that connects to the internet via a residental
gateway.
The router is set up as a 'router' not a 'gateway' as are the options.
Changing it to a gateway seemingly has no effect.

The router is acting only as a hub. changing these modes in the router
will not do anything to the local network - they would be for the
Router's internet connection (It doesn't have one though).

I believe the problem is that there is no route, default or otherwise in the
router to forward traffic to the modem. Any static route I put in doesnt
seem to work.

Correct - The router does not have an internet connection for you to
forward traffic to. It is PC1 which should be forwarding traffic using
some sort of ICS software - The internet connection Belongs to PC1.

The NIC on PC2 has an IP address of 192.168.1.74 /24
The NIC on PC1 has an IP address of 192.168.1.75 /24 (connects to the
router)
The NIC on PC1 has an IP address of xxx.xxx.xxx.xxx (connects to the
internet)
The router has an IP address of 192.168.1.1 /24

Pings from PC1 will hit every address in the network.
Pings from PC2 can hit every address but the xxx.xxx.xxx.xxx network.

Any ideas?

I strongly suggest connecting the cable modem to your router. This will
allow both PCs to connect to the internet without any further messing
around.

 

[Cory]

----- Original Message -----
From: "Ben Cottrell" <[email protected]>
Newsgroups: comp.os.ms-windows.networking.windows
Sent: Monday, October 04, 2004 6:58 AM
Subject: Re: home networking problem

I don't understand why you have done this.. The point of a Router is
that you connect the cable modem to the router, and let it share the
internet connection. Otherwise, as the other poster mentioned, you may
aswell not even have a Router.

The router is basically acting as a 4 port hub, I am only using it in the
absence of an actual hub.

I'm not sure what you're trying to achieve.. your transfer speeds will not
be affected by using NAT. If you have experienced a loss in transfer
speeds with NAT then something else is poorly configured.

I tested this myself before commiting to the design. I noticed that while
using NAT my transfer speeds took a big hit. It wasnt because of multiple
computers on the router sharing the bandwidth, as at the time of testing
only PC1 was connected. However, it seems from the responses that address
translation will have very little if any affect on my transfer rates, if
that is the case I will look into other possibilities.

This shows that the network is functioning properly.


The router is acting only as a hub. changing these modes in the router
will not do anything to the local network - they would be for the Router's
internet connection (It doesn't have one though).


Correct - The router does not have an internet connection for you to
forward traffic to. It is PC1 which should be forwarding traffic using
some sort of ICS software - The internet connection Belongs to PC1.


I strongly suggest connecting the cable modem to your router. This will
allow both PCs to connect to the internet without any further messing
around.

The only other reason I put PC1 outside the router is that I am planning on
running a web server that I can access remotely. I am designing a simple web
page that I will need to have access to over the next few weeks. I have it
set up using my current global ip address, but I am unsure if it is possible
to run a server inside a NAT system that can be accessed from the outside
world. If it is possible, I have no idea how to set it up. I guess I have
something else to research today.

 

[James Egan]

The only other reason I put PC1 outside the router is that I am planning on
running a web server that I can access remotely. I am designing a simple web
page that I will need to have access to over the next few weeks. I have it
set up using my current global ip address, but I am unsure if it is possible
to run a server inside a NAT system that can be accessed from the outside
world. If it is possible, I have no idea how to set it up. I guess I have
something else to research today.

It is usually possible because most routers will support port
forwarding.

If you want to connect both machines to the Internet, either the
router or PC1 will need to perform address translation or you can use
a proxy. As has already been pointed out, connecting your cable modem
to the Internet port of the router will be your best option. Then you
can forward port 80 traffic to the pc running the web server.

More of a concern might be if your ISP blocks incoming connections on
port 80 to dissuade you from running a personal (bandwidth guzzling)
web server. But there are ways around that too (apart from changing
ISP's).


Jim.