Re: Router: From outside Unable to access resources on assigned ports

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From: Robin Walker (rdhw_at_cam.ac.uk)
Date: 10/19/04 

Date: Tue, 19 Oct 2004 23:09:56 +0100

"Grove Erasmus" <gerasmus@netwerke.net> wrote in message
news:e5df6f4b.0410191040.591985a2@posting.google.com
>
> Unable to connect to my machines from outside when connected via 2
> routers.
> I'm unable to use any IIS (FTP/HTTP) and Remote desktop to my
> computer.
> All machines in network can access each other's resources and external
> resources
>
> 1. Phone line/DSL Line connects to,
> 2. Wired Router (10.0.0.2) connects to (via a wire),
> 3. Wireless Linksys cable router (192.168.1.1), connected to,
> 4. PC1: Wireless IP 192.168.1.100
> PC2: Wireless IP 192.168.1.101
> PC3: Wireless IP 192.168.1.102
>
> Goal: To able to connect from external remote site to my home LAN and
> use the IIS/WWW/FTP/Remote desktop function.

You have two layers of NAT, which makes things difficult.

For instance, to get web access to PC1 from the outside world, you will need
to set up port-forwards for TCP port 80 in both routers.

In router (2) you will need to forward port 80 to the Linksys (you don't say
what its WAN-side IP address is, you will need to find out).

In router (3) you will need to forward port 80 to the required local PC.

Then from the outside world, you would make an HTTP call to the WAN address
of router (2), which again you have not specified, but you will have to find
out. 

-- 
Robin Walker
rdhw@cam.ac.uk

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