File sharing problem when one computer connected to I-net

  • Thread starter Thread starter Descartes
  • Start date Start date
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Descartes

Hi folks,

Could anybody help me with this issue?

The setup:
One computer (A) has a wireless connection to a NAT router, which is
connected to a broadband cable modem.
Computer (A) also has a wired connection to another computer (B).
Computer (B) is only connected to computer (A).
Both computers are running XP Pro with SP2
Windows firewall is disabled on both computers.
Computer (A) has F-Secure Internet Security installed and the firewall
is setup to allow all IP traffic to/from IP address 192.168.0.200
(Computer (B)). Also the NIC for the wired connection to (B) is set to
'Thrusted'.
Both computers have the same workgroup name.
I'm logged in with the same username/password, with admin rights, on
both computers.

Intended functionality
Computer (B) should operate as a file server, only. No need for
internet connection.
Occasionally computer (B) should also work as a test server for web
sites, using IIS.
Computer (A) should be able to access the files on computer (B) and
also have an internet connection.

The problem
With the current settings, when the wireless connection to the
internet on computer (A) is disabled, file sharing works between (A)
and (B). Sometimes computer (B) is not visible under Network Places -
Workgroup of computer (A). However, even in this situation the shares
of (B) is still accessible, so that's OK.
But if I enable the wireless connection to the internet on computer
(A), then file sharing does not work anymore and an error message is
displayed, when I try to access the shares:
"\\PENA4\Data is not available ....
The path is not found."
(Wording maybe not exactly correct, I have a Finnish OS)
If I then disable the wireless connection again, file sharing starts
to work almost immediately.

What I have checked sofar
On PChuck's site (thanks for a great knowledge base), I read about
browser conflicts, so I disabled the browsing service on (A), but that
did not solve the issue. Neither if I enabled it on (A) and disable on
(B). Now I have them enabled on both.

No contradiction in IP addresses, which are setup as follows:
The wireless router is setup to have address 192.168.0.1
(A) wireless connection is given by the DHCP of the router, and the
router is setup to give a fixed address for this connection
(192.168.0.101)
(A) wired connection (to (B)) is given a fixed address (192.168.0.11)
in IP setup
(B) wired connection is given a fixed address (192.168.0.200) in IP
setup
Submask for all is 255.255.255.0

No unneeded transport protocols, all IP connections are setup to have:
Client of Microsoft networks
Sharing of files and printers in Microsoft networks
QoS packet scheduler
Internet protocol

NetBT is forced enabled on all connections.
No DNS's are setup (when connected the wireless connection of (A) has
DNS entries as provided by my ISP).
No WINS are setup.

I have run the 'ipconfig /all', 'net config server', 'net config
workstation' and 'browstat status' in both situations - wireless
connection disabled and enabled, but could not find any clues on the
cause of the problem.
I will be glad to send the results of these, if they are usable in
Finnish language ;-) ?

Obviously the browsing gets messed up, but why would that happen when
I enable the wireless connection?

Any suggestions are highly appreciated.

Best regards
Descartes
 
"Descartes" said:
Hi folks,

Could anybody help me with this issue?

The setup:
One computer (A) has a wireless connection to a NAT router, which is
connected to a broadband cable modem.
Computer (A) also has a wired connection to another computer (B).
Computer (B) is only connected to computer (A).
Both computers are running XP Pro with SP2
Windows firewall is disabled on both computers.
Computer (A) has F-Secure Internet Security installed and the firewall
is setup to allow all IP traffic to/from IP address 192.168.0.200
(Computer (B)). Also the NIC for the wired connection to (B) is set to
'Thrusted'.
Both computers have the same workgroup name.
I'm logged in with the same username/password, with admin rights, on
both computers.

Intended functionality
Computer (B) should operate as a file server, only. No need for
internet connection.
Occasionally computer (B) should also work as a test server for web
sites, using IIS.
Computer (A) should be able to access the files on computer (B) and
also have an internet connection.

The problem
With the current settings, when the wireless connection to the
internet on computer (A) is disabled, file sharing works between (A)
and (B). Sometimes computer (B) is not visible under Network Places -
Workgroup of computer (A). However, even in this situation the shares
of (B) is still accessible, so that's OK.
But if I enable the wireless connection to the internet on computer
(A), then file sharing does not work anymore and an error message is
displayed, when I try to access the shares:
"\\PENA4\Data is not available ....
The path is not found."
(Wording maybe not exactly correct, I have a Finnish OS)
If I then disable the wireless connection again, file sharing starts
to work almost immediately.

What I have checked sofar
On PChuck's site (thanks for a great knowledge base), I read about
browser conflicts, so I disabled the browsing service on (A), but that
did not solve the issue. Neither if I enabled it on (A) and disable on
(B). Now I have them enabled on both.

No contradiction in IP addresses, which are setup as follows:
The wireless router is setup to have address 192.168.0.1
(A) wireless connection is given by the DHCP of the router, and the
router is setup to give a fixed address for this connection
(192.168.0.101)
(A) wired connection (to (B)) is given a fixed address (192.168.0.11)
in IP setup
(B) wired connection is given a fixed address (192.168.0.200) in IP
setup
Submask for all is 255.255.255.0

No unneeded transport protocols, all IP connections are setup to have:
Client of Microsoft networks
Sharing of files and printers in Microsoft networks
QoS packet scheduler
Internet protocol

NetBT is forced enabled on all connections.
No DNS's are setup (when connected the wireless connection of (A) has
DNS entries as provided by my ISP).
No WINS are setup.

I have run the 'ipconfig /all', 'net config server', 'net config
workstation' and 'browstat status' in both situations - wireless
connection disabled and enabled, but could not find any clues on the
cause of the problem.
I will be glad to send the results of these, if they are usable in
Finnish language ;-) ?

Obviously the browsing gets messed up, but why would that happen when
I enable the wireless connection?

Any suggestions are highly appreciated.

Best regards
Descartes
Click to expand...

The problem is that both the wired and wireless connections on
Computer (A) have IP addresses in the same subnet (192.168.0.x).

Use a different subnet, such as 192.168.1.x, for the wired connections
between (A) and (B).
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
 
Steve Winograd said:
The problem is that both the wired and wireless connections on
Computer (A) have IP addresses in the same subnet (192.168.0.x).

Use a different subnet, such as 192.168.1.x, for the wired
connections
between (A) and (B).
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
Click to expand...

Steve,

Thank you for the advice! Problem solved. Just imagine what one bit
can do!
Would you still be kind and explain this to me and any others that may
be wondering, why this is crucial?

Best regards
Descartes
 
"Descartes" said:
Steve,

Thank you for the advice! Problem solved. Just imagine what one bit
can do!
Would you still be kind and explain this to me and any others that may
be wondering, why this is crucial?

Best regards
Descartes
Click to expand...

You're welcome, Descartes.

When a computer has two network connections with IP addresses in the
same subnet, it uses one of them for all network access and doesn't
use the other one at all. So, either your Internet access would work,
or your network between (A) and (B) would work, but not both of them
at once.

Two network connections with IP addresses in different subnets can
work simultaneously.
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
 
When a computer has two network connections with IP addresses in the
same subnet, it uses one of them for all network access and doesn't
use the other one at all. So, either your Internet access would
work,
or your network between (A) and (B) would work, but not both of them
at once.

Two network connections with IP addresses in different subnets can
work simultaneously.
Click to expand...

Thank you and all the best to you, Steve.

Descartes
 
"Descartes" said:
Thank you and all the best to you, Steve.

Descartes
Click to expand...

You're welcome!
--
Best Wishes,
Steve Winograd, MS-MVP (Windows Networking)

Please post any reply as a follow-up message in the news group
for everyone to see. I'm sorry, but I don't answer questions
addressed directly to me in E-mail or news groups.

Microsoft Most Valuable Professional Program
http://mvp.support.microsoft.com
 
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