lcan

Hi,

My PC running XP Home cannot talk to my webserver (dynnamic IP, configured
via Zoneedit). Ftp and ping also does not work. However, I can access my
server from every other computer in the world!

I tried disable PC NIS 2003 firewall but still does not work. I also
edited PC tcp/ip properties to include the Zoneedit DNS servers. No luck!

Is this a limitation of XP Home? I am so frustrated with two computers
next to each other that cannot talk...

What else can I do? LMHOSTS lookup is enabled. NETBios Over TCP/IP is
set to default (also tried enable but no effect).

My server runs Redhat 8.0. The server and PC connects to an ADSL modem via
a hub. The IP adddresses are dynamic (hence Zoneedit).

Please help! I haven't have a good sleep since Saturday!

--lc

marc reynolds [msft]

I have no idea what zoneedit is. How are the two computers physically
connected? Cross-over cable? Hub? Switch? Are the configured with IP
addresses on the same subnet with the same subnet mask?

--

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.

lcan

Marc,

Thanks for the reply. As explained the two computers are connected to
ADSL modem via a hub. The dynamically assigned IPs are not in the same
subnet.

I hope to find out:
1. How I can ping my Windows XP Home computer
2. How I can ping/ftp/http to the server

I will also be enabling telnet on the server in the near future. What
would be required on the windows xp home to enable that connection?

Thx,
lc

marc reynolds [msft]

if you have two PCs plugged into the same hub, but confgiured for different
IP subnets they will not be able to communicate over the network in any
manner (unless the hub is uplinked to a router or switch configured for
VLANs).
Configure the client to be on the same subnet as the server.

--

Thanks,
Marc Reynolds
Microsoft Technical Support

This posting is provided "AS IS" with no warranties, and confers no rights.

alan j. mcfarlane

Is the ADSL modem also a NAT/firewall thingy? What are your two PCs'
addresses? Is there port forwarding (or whatever it's called) set-up on the
NAT to forward HTTP traffic to the Linux box? What address appears in the
DNS for your domain name?

If you are using a NAT then your address will be something like:
XP box 192.168.100.10,
Linux box 192.168.100.11,
NAT/firewall box: inside 192.168.100.1, outside 192.0.2.159

And when you do a DNS lookup for your domain name you'll get back
192.0.2.159. So when you try to connect to your webserver you'll get the
outside address and not the inside address. And apparently your NAT box
does not forward the packets back inwards.

Try loading http://192.168.100.11, using whatever the Linux box's real
address
is. Traceroute (tracert.exe) might be useful to see where packets to the
various addresses are going...

This is another of the problems with NAT. One has to have two DNSs
(sometimes called split DNS), one for use inside the NAT-ed network and
another internet accessable one for outside. One simpler way to do this for
you, is to put a corresponding entry in the "hosts" files on your box which
will be used instead of doing the DNS lookup.


My guess, as above, is that addressing alone is the issue. Once you can
communicate using any protocol (e.g. ICMP Ping) all others will work too.


--
Alan J. McFarlane
http://homepage.ntlworld.com/alanjmcf/
Please follow-up in the newsgroup for the benefit of all.

lcan

Thanks Marc! My IPs are dynamically assigned by ISP so I may not be able to
force them into the same subnet. If I change the linksys hub to a router
(SMC with SPI firewall), would that solve the problem? What would I need to
config on the router ?

Some high level explanation on why hub won't work is appreciated.

Sincere thanks,
lc