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windows 7 problems with computers not appearing on the network map - only some


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joecool99's Avatar
joecool99 joecool99 is offline
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19-Aug-2010, 12:44 AM #1
Question windows 7 problems with computers not appearing on the network map - only some
small network with 8 stations running windows 7 PC ultimate 32-bit. all were fresh installed with BitDefender 2010 antivirus and MS office 2007. 4 brand new laptops + 3 new desktops + older P4 desktop on ethernet (the old one is visible as billing-pc)

most of them are via WIFI-n, one via ethernet. on the network is also mac mini 2010 server running SMB for file sharing services. the server is not showing by default ether.

at some point i began to notice that not all computers are showing under the "network" in windows explorer.
i can easily ping all computers by IP or name without problems. i can always force open the computers shared files.

windows firewall is on on all as standard from installation and has not been touched. IPv6 disabled on all.

i started to mess around in advanced sharing but, none seems to have an effect:






when i force the computer to open \\server it shows in the network browser, but when i refresh the window, it disapears from the main right side window and remains as old link on the left:



mostly 3-4 stations list normally all the time. i've checked ipconfig -all on a visible vs. unvisible computer and that was identical:

Code:
C:\Users\bruce>ipconfig -all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : bruce-PC
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Peer-Peer
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) WiFi Link 5100 AGN
   Physical Address. . . . . . . . . : 00-24-D6-9B-E6-78
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.0.4(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.240
   Lease Obtained. . . . . . . . . . : Wednesday, August 18, 2010 7:59:58 AM
   Lease Expires . . . . . . . . . . : Wednesday, August 25, 2010 6:05:35 PM
   Default Gateway . . . . . . . . . : 192.168.0.1
   DHCP Server . . . . . . . . . . . : 192.168.0.1
   DNS Servers . . . . . . . . . . . : 192.168.0.1
   Primary WINS Server . . . . . . . : 192.168.0.2
   Secondary WINS Server . . . . . . : 192.168.0.2
   NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.{E5C0BD26-5D44-4C05-AC5A-38A4A41FD760}:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Microsoft ISATAP Adapter
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Teredo Tunneling Pseudo-Interface:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
   Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv6 Address. . . . . . . . . . . : 2001:0:4137:9e74:18d9:1806:3f57:fffb(Pref
erred)
   Link-local IPv6 Address . . . . . : fe80::18d9:1806:3f57:fffb%13(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled

i hope this might be a common issue with a quick fix before i spent hours of investigating this...
please advise what i should check.
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19-Aug-2010, 02:40 AM #2
Doesn't sound like you are using a domain controller,so
are they all set to the same workgroup?
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19-Aug-2010, 02:47 AM #3
yes, they are all in WORKGROUP. the mac server running SMB as:

with enabled:
workgroup master browser
domain master browser
enable wins server

all checked. see the IPCONFIG - the wins server has the mac server .0.2 IP address

* note the picture is not accurate - just to demonstare, there is no errow as shown below
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19-Aug-2010, 08:35 AM #4
Download and run LanScan and post the results here.
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19-Aug-2010, 02:16 PM #5
i get his error: ?

Code:
LANscanner v1.3 - ScottiesTech.Info

Scanning LAN...

System error 1326 has occurred.

Logon failure: unknown user name or bad password.


Press any key to exit...
normally there are only 4 computers visible in the Network - but i should see 8 PC's + the mac server
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19-Aug-2010, 02:19 PM #6
same when i try this in command line:

* i tried this and the lanscanner on the computer that's not listed by default in the network

Code:
C:\>net view
System error 1326 has occurred.

Logon failure: unknown user name or bad password.


C:\>
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19-Aug-2010, 02:24 PM #7
Sounds like a firewall issue, I've never seen that.
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19-Aug-2010, 03:13 PM #8
i've disabled the firewall on the computer that i run this on and same error...
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19-Aug-2010, 04:20 PM #9
i just tried the same from a computer that is normally visible, both CMD command line and lanscanner. same result error as above
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19-Aug-2010, 05:12 PM #10
similar situation here:

http://www.sevenforums.com/network-s...-computer.html

however i do not log in - i just try to list with net view

this didn't help - although it was initially not defined! i changed it to:

Code:
To change Windows to use NTLMv1 perform the following:
Start > Run > secpol.msc
Local Policies > Security Options > Network Security LAN [COLOR=#0072BC ! important][COLOR=#0072BC ! important]Manager[/COLOR][/COLOR] authenticatioin level
Select Send LM & NTLM - use NTLMv2 session security if negotiated
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19-Aug-2010, 07:10 PM #11
When I run it I see all the workstations that are currently connected.


LANscanner v1.3 - ScottiesTech.Info

Scanning LAN...

DISKSTATION 192.168.0.144 00-00-00-00-00-00 WORKGROUP MASTER
DNS-321 192.168.0.143 00-00-00-00-00-00 WORKGROUP
DNS-323 192.168.0.142 00-00-00-00-00-00 WORKGROUP
MAIN 169.254.252.79 00-50-56-C0-00-01 WORKGROUP
VISTA 192.168.0.62 00-E0-4C-DF-CD-ED WORKGROUP

Press any key to exit...
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19-Aug-2010, 11:16 PM #12
got this response from the LANscanner creator:


From this page: http://www.chicagotech.net/systemerrors.htm

System error 1326 has occurred - Logon failure: unknown user name or bad password.

Symptom: when using net use to map a network drive, you may receive "System error 1326 has occurred. Logon failure: unknown user name or bad password." message.

Resolutions: 1) create a user account on remote computer; 2) need to enable the guest account; 3) make sure the remote computer doesn't use auto-logon and blank password; 4) make sure you have a folder or drive shared on the remote computer. 5) use net use \\servername /user:username command. Make sure you type correct command (e.g. use net use \\servername \user:username will get this error too)

I'm guessing this is due to the presence of the Mac Mini running as the master on the LAN. I *have* actually tested LANscanner with a Mac on the LAN, specifically an old G5 running Leopard. LANscanner could never see the Mac, no matter what I did. But, I didn't get any error messages. I also have a Linux box running as the master, and LANscanner DOES see it okay, and it works great.

I suspect that the implementation of Samba on the Mac is not exactly "friendly" with Windows 7. The only way I ever got networking to work well with a Mac on the network was to edit the hell out of the smb.conf file, which apparently one can no longer do in Leopard. My Samba-monkeying experiences were back in the days of Tiger.

Other than that, I'm afraid I don't have any idea what to do to fix your problem. Well, you could disconnect the Mac, wait a minute, and then try to run LANscanner. That would tell you if indeed the 1326 error is because the Windows networking tools that LANscanner uses don't know what to do with the Mac implementation of SMB. Then at least you'd know something has to be altered in the Mac's Samba config - or that the Mac is NOT the problem!

Regards,
Scottie


man, this is a real bummer! i'll certainly try to disconnect MAC server from LAN.
however, then the workstations will have another selection about who is domain master browser correct ?
isn't that what i'm trying to avoid ? i need PC as "slaves" and submit to the mac server as their master browser - correct ?
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20-Aug-2010, 04:29 AM #13
Quote:
Originally Posted by joecool99 View Post
got this response from the LANscanner creator:
man, this is a real bummer! i'll certainly try to disconnect MAC server from LAN.
however, then the workstations will have another selection about who is domain master browser correct ?
isn't that what i'm trying to avoid ? i need PC as "slaves" and submit to the mac server as their master browser - correct ?
Yup. Technically, I'm not sure if you need the Mac to be the master browser just for sharing files. If it's only needed as a file server and nothing else, it should work just fine to allow a Windows box to be the MB. In fact, I'm wondering if maybe the problem is that the Mac needs to report itself (via Samba) as a higher "version" than the Windows 7 boxes. Maybe the Mac is saying, "I'm the MB!" and the Windows 7 machines are saying, "Dude, you're a lower version than me, so I'M gonna take over!" and thus things go wonky. Windows itself selects a MB based on certain parameters, one of which is which OS (more or less) is newest. Of course, it doesn't always work that way, because this is MS we're talking about!

You can define the "os level" in the smb.conf file (on a linux box anyway) by editing /etc/samba/smb.conf so it has something like this:

local master = yes
preferred master = yes
domain master = yes
os level = 255

It's the "os level = 255" that tells Windows 7 that the linux machine is the big boss when it comes to OS "newness".

Now, the only question is how to edit the smb.conf on the Mac. I remember in Tiger you could edit the file directly, but in Leopard they turned it into a link that pointed to somewhere mysterious, because the smb.conf file was autogenerated and gets obliterated when changes are made to the Samba config via the GUI. There's gotta be a nice GUI tool out there by now, though, right?

Hope this helps!
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20-Aug-2010, 08:35 AM #14
That's how I tell my D-Link NAS boxes that they're NOT the master, I set all of those to no.
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20-Aug-2010, 11:53 AM #15
the problem with the windows boxes is that they don't stay on the whole time. people work on different schedule.
how long does it take for windows to elect MB ? when the current MB machine goes off ?

wouldn't constant election mess stuff too ? if a current W machine is MB and goes off, what happens when it goes on again while the rest elected a new MB ?

is there a way to edit this manually too in windows and point it to mac server ?
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