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Solved: wired-wired file sharing works, wired-wireless doesn't

Discussion in 'Networking' started by Borgzone, Sep 18, 2009.

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  1. Borgzone

    Borgzone Thread Starter

    Joined:
    Sep 18, 2009
    Messages:
    5
    I've got a regular desktop pc and a laptop. Both are running Windows 7.

    If both machines are wired, file and printer sharing works like expected. If the laptop is on the wireless, things go sour...

    The machines don't see each other, I can't ping the laptop from the desktop or vice versa. Strangely enough, if I ping the desktop from the laptop by IP address the desktop will reply. At that point the desktop will see the laptop too and sharing (file, printer & media) works fine. But if the connection is idle for a couple of minutes they won't see each other anymore.

    I've tried all kinds of things: disabled IPv6 on both, reconfigured file and printer sharing, disabled the firewalls on both. But none of these changes have had any effect whatsoever. I have also tried to give everything the same name (SSID, workgroup and network name on the desktop) but that had no effect either.

    More info:
    - Wired and wireless clients are on the same subnet.
    - The router is a Linksys WRT-350N
    - AP isolation is disabled
    - uPnP is enabled on the router

    Does anyone have any clue how to fix this?
     
  2. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    Let's see this for each computer when you have the laptop running wirelessly.


    Hold the Windows key and press R, then type CMD to open a command prompt:

    In the command prompt window that opens, type type the following commands, one at a time, followed by the Enter key:

    Note that there is a space before the -n or the /ALL, but there is NOT a space after the - or / in the following commands.

    NBTSTAT -n

    IPCONFIG /ALL

    Right click in the command window and choose Select All, then hit Enter to copy the contents to the clipboard.
    Paste the results in a message here.

    If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.
     
  3. Borgzone

    Borgzone Thread Starter

    Joined:
    Sep 18, 2009
    Messages:
    5
    This is for the wired desktop:

    Code:
    C:\>nbtstat -n
    
    Local Area Connection 2:
    Node IpAddress: [192.168.1.100] Scope Id: []
    
                    NetBIOS Local Name Table
    
           Name               Type         Status
        ---------------------------------------------
        DISCOVERY      <00>  UNIQUE      Registered
        HIVEMIND       <00>  GROUP       Registered
        DISCOVERY      <20>  UNIQUE      Registered
        HIVEMIND       <1E>  GROUP       Registered
    
    Local Area Connection:
    Node IpAddress: [0.0.0.0] Scope Id: []
    
        No names in cache
    
    Bluetooth Network Connection:
    Node IpAddress: [0.0.0.0] Scope Id: []
    
        No names in cache
    
    C:\>ipconfig /all
    
    Windows IP Configuration
    
       Host Name . . . . . . . . . . . . : Discovery
       Primary Dns Suffix  . . . . . . . :
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : telenet.be
    
    Ethernet adapter Bluetooth Network Connection:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
       Physical Address. . . . . . . . . : 00-07-61-45-74-CE
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    Ethernet adapter Local Area Connection 2:
    
       Connection-specific DNS Suffix  . : telenet.be
       Description . . . . . . . . . . . : Intel(R) PRO/1000 PL Network Connection
       Physical Address. . . . . . . . . : 00-15-F2-9F-63-80
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
       Link-local IPv6 Address . . . . . : fe80::14b1:54e:f62e:8695%13(Preferred)
       IPv4 Address. . . . . . . . . . . : 192.168.1.100(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Lease Obtained. . . . . . . . . . : vrijdag 18 september 2009 15:02:36
       Lease Expires . . . . . . . . . . : zaterdag 19 september 2009 15:02:36
       Default Gateway . . . . . . . . . : 192.168.1.1
       DHCP Server . . . . . . . . . . . : 192.168.1.1
       DHCPv6 IAID . . . . . . . . . . . : 301995506
       DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-15-B7-F8-00-15-F2-A6-1A-2A
    
       DNS Servers . . . . . . . . . . . : 195.130.130.4
                                           195.130.131.4
       NetBIOS over Tcpip. . . . . . . . : Enabled
    
    Ethernet adapter Local Area Connection:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Marvell Yukon 88E8001/8003/8010 PCI Gigab
    it Ethernet Controller
       Physical Address. . . . . . . . . : 00-15-F2-A6-1A-2A
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    Tunnel adapter isatap.telenet.be:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . : telenet.be
       Description . . . . . . . . . . . : Microsoft ISATAP Adapter
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
    
    Tunnel adapter isatap.{1DBD71ED-3C10-461E-8EFE-6B114E3EFC5D}:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
    
    Tunnel adapter Local Area Connection* 9:
    
       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:d5c7:a2d6:2004:37ba:ab39:f424(Pref
    erred)
       Link-local IPv6 Address . . . . . : fe80::2004:37ba:ab39:f424%15(Preferred)
       Default Gateway . . . . . . . . . : ::
       NetBIOS over Tcpip. . . . . . . . : Disabled
    
    Tunnel adapter isatap.{C0E1FCC8-444D-4078-A9F4-EB797D19FB11}:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Microsoft ISATAP Adapter #3
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
     
  4. Borgzone

    Borgzone Thread Starter

    Joined:
    Sep 18, 2009
    Messages:
    5
    This is for the wireless laptop:

    Code:
    C:\>nbtstat -n
    
    Local Area Connection:
    Node IpAddress: [0.0.0.0] Scope Id: []
    
        No names in cache
    
    Wireless Network Connection 2:
    Node IpAddress: [192.168.1.101] Scope Id: []
    
                    NetBIOS Local Name Table
    
           Name               Type         Status
        ---------------------------------------------
        ENDEAVOUR      <00>  UNIQUE      Registered
        HIVEMIND       <00>  GROUP       Registered
        ENDEAVOUR      <20>  UNIQUE      Registered
        HIVEMIND       <1E>  GROUP       Registered
        HIVEMIND       <1D>  UNIQUE      Registered
        ..__MSBROWSE__.<01>  GROUP       Registered
    
    Wireless Network Connection:
    Node IpAddress: [0.0.0.0] Scope Id: []
    
        No names in cache
    
    C:\>ipconfig /all
    
    Windows IP Configuration
    
       Host Name . . . . . . . . . . . . : Endeavour
       Primary Dns Suffix  . . . . . . . :
       Node Type . . . . . . . . . . . . : Hybrid
       IP Routing Enabled. . . . . . . . : No
       WINS Proxy Enabled. . . . . . . . : No
       DNS Suffix Search List. . . . . . : telenet.be
    
    Wireless LAN adapter Wireless Network Connection 2:
    
       Connection-specific DNS Suffix  . : telenet.be
       Description . . . . . . . . . . . : Wireless-N USB Network Adapter
       Physical Address. . . . . . . . . : 00-1C-10-E7-53-41
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
       IPv4 Address. . . . . . . . . . . : 192.168.1.101(Preferred)
       Subnet Mask . . . . . . . . . . . : 255.255.255.0
       Lease Obtained. . . . . . . . . . : vrijdag 18 september 2009 15:02:37
       Lease Expires . . . . . . . . . . : zaterdag 19 september 2009 16:29:10
       Default Gateway . . . . . . . . . : 192.168.1.1
       DHCP Server . . . . . . . . . . . : 192.168.1.1
       DNS Servers . . . . . . . . . . . : 195.130.130.4
                                           195.130.131.4
       NetBIOS over Tcpip. . . . . . . . : Enabled
    
    Wireless LAN adapter Wireless Network Connection:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . :
       Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG Network Con
    nection
       Physical Address. . . . . . . . . : 00-1B-77-1F-E3-B6
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    Ethernet adapter Local Area Connection:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . : telenet.be
       Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controlle
    r
       Physical Address. . . . . . . . . : 00-18-8B-D1-21-0F
       DHCP Enabled. . . . . . . . . . . : Yes
       Autoconfiguration Enabled . . . . : Yes
    
    Tunnel adapter isatap.{6C6ECCBF-664E-4532-AA63-AD14297C189A}:
    
       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 Local Area Connection* 9:
    
       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:d5c7:a2d6:cb3:ba8:ab39:f424(Prefer
    red)
       Link-local IPv6 Address . . . . . : fe80::cb3:ba8:ab39:f424%13(Preferred)
       Default Gateway . . . . . . . . . : ::
       NetBIOS over Tcpip. . . . . . . . : Disabled
    
    Tunnel adapter isatap.telenet.be:
    
       Media State . . . . . . . . . . . : Media disconnected
       Connection-specific DNS Suffix  . : telenet.be
       Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
       Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
       DHCP Enabled. . . . . . . . . . . : No
       Autoconfiguration Enabled . . . . : Yes
    
     
  5. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    They sure look like they should see each other.

    Can you ping by IP address either way?
     
  6. Borgzone

    Borgzone Thread Starter

    Joined:
    Sep 18, 2009
    Messages:
    5
    Nope. Ping by IP only works from wireless to wired. If I ping the laptop by IP, I still get "Destination host unreachable" until the laptop pings the desktop.
     
  7. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    After you ping the desktop, does that change pinging the laptop from the desktop? Have you disabled ALL firewalls on the laptop?
     
  8. Borgzone

    Borgzone Thread Starter

    Joined:
    Sep 18, 2009
    Messages:
    5
    I believe I've solved the problem!

    Apparently, the wireless MAC filter of the router also applies to wired devices attempting to connect to wireless devices. I've added the desktop's MAC address to the whitelist and now they see each other.

    It would've been helpful if this behaviour was documented on the help page of the wireless MAC filter. I thought it was only a filter for wireless devices who wanted to connect, but it's a filter for any device that wants any access to the wireless side.

    The reason why it started to work after pinging from wireless to wired is probably some temporary whitelist I think. Something along the lines of "wireless device A accessed device B so device B is also allowed to access device A". That probably lasted until the connection state went to closed again... at least that's what I think.

    Thanks for your efforts though!
     
  9. JohnWill

    JohnWill Retired Moderator

    Joined:
    Oct 19, 2002
    Messages:
    106,418
    Yes, MAC filtering will get in the way.

    FWIW, MAC filtering is a pretty anemic protection. If you want real wireless protection, WPA encryption with a strong key is the minimum, and WPA2-AES is best.


    A good read: The Six Dumbest Ways to Secure A Wireless LAN
     
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