I have two computers, a notbook and a desktop. The notebook runs
Windows 2000 and the desktop runs Windos XP Professional. The
notebook belongs to a corporate network. I want to conncect the two
computers using a cross-over cable. The cross-over cable is working,
but I am not able to access the files in any computer. I tried
changing IP address and adding a subnetmask to no avail. The
corporate network has to continue working at the notebook. The
desktop computer uses dial-up Internet. Both computers have network
cards. |
Request for Question Clarification by
joseleon-ga
on
22 Dec 2002 01:48 PST
Hello, olecram:
Just a few quick questions before go deeper ;-)
Have you tried to make a "ping" from one machine to the other? i.e
ping 172.16.2.1
Are both machines in the same network class? I mean, they share the
same ip ranges and subnetmask?
Regards.
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Clarification of Question by
olecram-ga
on
22 Dec 2002 04:24 PST
Hello JoseLeon,
Yes, I have tried to ping the notebook from the computer, it timed
out. I aldo tried to access the notebook using VNC, a
PC-Anywhere-like software (for more info on VNC go to
www.uk.research.att.com/vnc), as I have the server installed in the
notebook. The client was not able to reach the notebook and gave me
the error message that it was not able to search for the network.
When I connected the two computers, they were assigned the same IP
class: 169.something.something.different IP. I did not check for the
subnet.
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Request for Question Clarification by
joseleon-ga
on
22 Dec 2002 05:20 PST
Hello:
And how do you know the cross-over cable is working? Try to change
both computers to:
Computer 1: 172.16.2.50
Computer 2: 172.16.2.51
Both with 255.255.255.0 as subnet mask. If the cross-over cable is
working, with that configuration you must able at least to ping from
one machine to another. I think the IP numbers you are using
(169.something.something.different) are not allowed to work on a local
network. Try and post here your results. I don't answer the question
yet because I want to make a little investigation before.
Regards.
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Request for Question Clarification by
joseleon-ga
on
22 Dec 2002 05:27 PST
Hello, olecram:
Oops! I didn't read your comment below about the cross-over cable,
if you bought it, it must be working, but check if the lights on your
network adapters are on when you connect the cable to both computers.
Try to change the IP numbers to the ones I posted and tell me what
happen.
Regards.
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Clarification of Question by
olecram-ga
on
22 Dec 2002 08:56 PST
Hello Joseleon,
I did the changes you said and I was able to ping both computers.
Marcelo
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Request for Question Clarification by
joseleon-ga
on
22 Dec 2002 10:57 PST
Hello, olecram:
So if the ping works you can also access the files on the other
computer, isn't it? Could I answer the question and continue the
research if any?
Regards.
|
Hello, olecram:
With all the information you post, your problem seems very simple,
you just need to change the IP configuration for both computers to an
IP allowed for a local network, for example:
Computer 1: 172.16.2.50
Computer 2: 172.16.2.51
Both with 255.255.255.0 as subnet mask.
You must use this kind of addresses because they are allowed to be
used in a local network:
RFC1918
http://www.faqs.org/rfcs/rfc1918.html
3. Private Address Space
The Internet Assigned Numbers Authority (IANA) has reserved the
following three blocks of the IP address space for private
internets:
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
We will refer to the first block as "24-bit block", the second as
"20-bit block", and to the third as "16-bit" block. Note that (in
pre-CIDR notation) the first block is nothing but a single class A
network number, while the second block is a set of 16 contiguous
class B network numbers, and third block is a set of 256 contiguous
class C network numbers.
An enterprise that decides to use IP addresses out of the address
space defined in this document can do so without any coordination
with IANA or an Internet registry. The address space can thus be
used
by many enterprises. Addresses within this private address space
will
only be unique within the enterprise, or the set of enterprises
which
choose to cooperate over this space so they may communicate with
each
other in their own private internet.
As before, any enterprise that needs globally unique address space
is
required to obtain such addresses from an Internet registry. An
enterprise that requests IP addresses for its external connectivity
will never be assigned addresses from the blocks defined above.
After that, you don't need to do anything special to share files,
because you are now in a network through your cross-over cable, so
request for any clarification and we will make it work.
Search strategy
"local network" 172.16
://www.google.com/search?hl=en&ie=UTF-8&oe=utf-8&q=%22local+network%22+172.16&lr=
Regards. |
Request for Answer Clarification by
olecram-ga
on
22 Dec 2002 16:01 PST
Good, this is a great improvement. I am able to use NetMeeting and it
is working fine. However, I would like to make it more transparent
and use the computers as if I were in a network. I was not able to
add the computers to the Network Neighborhood, as this is my original
goal. How can I do it?
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Clarification of Answer by
joseleon-ga
on
22 Dec 2002 23:29 PST
Hello:
Do you have installed the client for Microsoft Networks? Do you
have installed the Share files and printers service? Both are
installed by default, but maybe it has been removed in some computer.
Go to the Network Properties and tell me which services, clients and
protocols do you have installed in both computers.
Regards.
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Request for Answer Clarification by
olecram-ga
on
22 Dec 2002 23:43 PST
Yes, it is installed in both computers. Here is what I have installed
in both computers:
Client for Microsoft Networks, File and Printer Sharing for Microsoft
Networks, NW Link NetBIOS, NWLink IPX/SPX/ NEtBIOS Compatible
Transport Protocol and TCP/IP.
Could it have anything to do with the workgroup that is defined in
each machine? or could it have anything to do with the settings for
the corporate network at the notebook? The corporate network has a
domain that was not the same in my desktop. I changed the domain name
on my desktop to the same name on my notebook and it did not work.
Also, I have tried getting the computers to see each other, so I ran
Windows XP's network wizard on the desktop. It asked me for a
computer name and a workgroup. I later changed these settings to the
ones I described above.
I also have administrator access to my notebook, but I really need the
corporate network to work.
Tks,
Marcelo
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Clarification of Answer by
joseleon-ga
on
23 Dec 2002 01:01 PST
Hello:
If the corporate network computer is attached to a domain
controller this could be the cause why you can't see your shares.
Disable this setting and configure both machines to be on the same
workgroup. Try now *again* \\computerip\ and tell me your results. Are
you able to change all your network configuration on the corporate
computer? We will try first to connect both computers and after this
works, we will try to connect it again to your corporate network, but
you will need to change the IP address of your corporate computer
everytime you want to connect it to your local one, this is a must.
Uninstall these network items:
-NW Link NetBIOS, NWLink IPX/SPX/ NEtBIOS Compatible Transport
Protocol
After that you must be able to see shares on both machines, also
browse the Network Neighborhood and tell me what happens. Give this
operation sometime (i.e 30 seconds)
Regards.
P.S. Tell me more about your corporate network connection, do you have
domain controller? Do you access using RAS? etc.
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Request for Answer Clarification by
olecram-ga
on
26 Dec 2002 21:51 PST
Hello joseleon,
I disabled the protocols you mentioned.
I've been trying to make it work but I was not lucky. After making
sure that my notebook and my desktop are on the same workgroup, I can
only access my notebook as the administrator. I am not able to see
the shares. I tried to mess around the shares and it seems that there
is some block from the network administrator in the notebook.
Also, when I am trying to use NetMeeting, I am only able to place a
call from the desktop to the notebook (the notebook is the one with
the corporate network). I ***cannot*** place a call from the notebook
to the desktop, it times out. However, I am able to ping both
computers.
Can you help?
Tks,
Olecram
PS: I do not know how to check for RAS or domain controller.
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Clarification of Answer by
joseleon-ga
on
27 Dec 2002 00:22 PST
Hello, olecram:
With the new information you post, there could be more problems,
because I don't know if your network administrator has place some
restriction policies or has installed a blocking software on your
desktop computer. Do you have administrator rights on both machines?.
If you can disable all the services I mentioned before on the desktop
computer, you must have admin access. Maybe the desktop computer has
configured the XP firewall to block the netmeeting ports, I don't
know. I would need some screenshots of your system, are you able to
publish screenshots on internet or send them by e-mail? If so, I will
provide you a list of things I need to "see" to verify your
connection.
And some more questions about your desktop computer:
Are you still able to connect your desktop computer to your
corporate network?
If you disabled all the services mentioned before and change the ip,
you must not be able to do so
How many ethernets have your desktop computer?
Maybe you have two ethernets and there are problems with this
How many network connections do you have installed on your desktop
computer?
Maybe you have create a new network connection and need to disable
the corporate one
In the advanced TCP/IP configuration, do you have installed a
gateway?
In the advanced TCP/IP configuration, do you have DNS servers
configured?
Try to disable them
Could you tell me what do you have on the WINS tab of the advanced
TCP/IP setup dialog?
Could you tell me what do you have on the Options tab of the
advanced TCP/IP setup dialog?
Connect two computers through a cross-over cable is just as simple as
to change the IP numbers, you don't even need to change the workgroup
or anything else, it's just a matter of tell them to work on the same
network. So this is turning in a very strange problem but the solution
must be really easy, it must be some changes on your default
configuration to allow work on your corporate network.
I need you to tell me all you know about your desktop computer and
your network administrator, maybe I can guess something from his/her
way of work.
Regards.
P.S. Sorry this problem is taking so much time, but bear in mind that
I need to know many things to guess what's happening.
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