Re: server with wireless NIC not accessible outside of LAN

From: David Efflandt (efflandt_at_xnet.com)
Date: 02/14/04 

Date: Sat, 14 Feb 2004 18:13:52 +0000 (UTC)

On 14 Feb 2004 00:48:20 -0800, John Lukar <johnlukar@yahoo.com> wrote:
> Hi,
>
> I have a linux RH9.0 with a wireless TEW-223PI(admtek) with their
> 8211 driver which I compile from source.
>
>
> I have a linksys hub(not wireless) connected to cable modem which acts
> as my internal DHCP server. I have another linksys hub(DHCP turned
> OFF) connected to the wired HUB providing AP to all my wireless
> desktops(XP) and this linux server with the TEW-223PI card.
>
> like so.
>
> -- cable modem ---> LAN HUB(dhcp)---->pc1 (LAN card)
> |
> |----->pc2 (LAN card)
> |
> |--->Wireless HUB (AP)---> pc3(wireless card)
> |
> |---------> laptop4 (wireless card)
> |
> |---------> linux RH9.0(wireless card)
>
>
>
> The linux RH9.0 I setup initialy with a LAN connection(i.e. RJ45) to
> the accesspont HUB so was not using the wireless card. I had setup
> port forwarding on my LAN HUB(dhcp) and I could access the linux box
> services from outside. DHCP assinged 192.168.1.104 to this linux
> server.
>
> This worked fine untill I switched the linux box to use the wireless
> card(eth1) by loading the driver. It picked up the AP HUB signal
> without a problem. The DHCP assigned 192.168.1.103 to this wireless
> card. I of course had unplugged the LAN card eth0.
>
> Now, from inside my LAN from laptop4 I can only access ssh ports and
> ssh into my linux RH9.0. I can no longer access the webserver which I
> used to be able to do. I can no longer access port 2401 which is my
> CVS server port on linux RH9.0. From outside LAN I can not even ssh
> any longer into my server. I get "connection to xxxx port 22,
> permission denied" from outside of LAN.

Your terminology is confusing. What you refer to as a hub in this case is
more likely a broadband NAT gateway or router (most of which have switch
ports rather than hub ports). It is always best to use static IPs for
servers on a LAN (in same network, but outside of dhcp assigned range).

Your problem could be any number of problems. Maybe your PC can no longer
find an IP on itself for its own hostname. Maybe your servers are
configured for a hostname that no longer points to your IP. Maybe you
have other DNS, port forwarding. or firewall configuration issues. Check
the logs for your gateway/routers and Linux and apache to see if they give
any clue. 

-- 
David Efflandt - All spam ignored  http://www.de-srv.com/

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