can't ping or view other network computers

#1
This laptop can access the internet and ping itself and the gateway, but can't ping other computers on the network. I am not using "HomeGroup" nor do I wish to. I had VMWare Workstation 7 and Comodo Internet Security 5 installed, but have since uninstalled them. I have the windows firewall disabled and all advanced sharing options at the most open settings on both computers. Both are running Win 7 x64 Ultimate. Both have the c drive shared and full permissions for everyone. Both have the same username and password. They do have different computer names and they are in the same workgroup. Both are connected through a wireless connection. The other computer can't see this laptop either. The drivers are the most up-to-date that I could find (the Acer website didn't offer a download for the wireless network card but I found one elsewhere.) The only other thing I can think of is that in the settings of utorrent, there is a button that says, "Install IPV6 Teredo," and I did click that button but I don't know how to undo it.

Here is the output of various command line commands:
Code:
C:\Users\80063r>ping 192.168.1.136

Pinging 192.168.1.136 with 32 bytes of data:
Reply from 192.168.1.124: Destination host unreachable.
Reply from 192.168.1.124: Destination host unreachable.
Reply from 192.168.1.124: Destination host unreachable.
Reply from 192.168.1.124: Destination host unreachable.

Ping statistics for 192.168.1.136:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

C:\Users\80063r>ipconfig /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : 80063r-Acer
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No

Wireless LAN adapter Wireless Network Connection:

   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Atheros AR5007EG Wireless Network Adapter
   Physical Address. . . . . . . . . : 00-1C-26-C3-0F-F2
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::184e:6f0d:876c:4dfc%12(Preferred)
   IPv4 Address. . . . . . . . . . . : 192.168.1.124(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Sunday, December 05, 2010 8:07:16 PM
   Lease Expires . . . . . . . . . . : Monday, December 06, 2010 8:07:16 PM
   Default Gateway . . . . . . . . . : 192.168.1.1
   DHCP Server . . . . . . . . . . . : 192.168.1.1
   DHCPv6 IAID . . . . . . . . . . . : 218111014
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-8B-7D-19-00-1B-24-8B-D6-5E
   DNS Servers . . . . . . . . . . . : 192.168.1.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

Ethernet adapter Local Area Connection:

   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Broadcom NetLink (TM) Gigabit Ethernet
   Physical Address. . . . . . . . . : 00-1B-24-8B-D6-5E
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Tunnel adapter isatap.{C6DC7F00-9712-47AD-B5E9-56B3C9861236}:

   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. . . . . . . . . . . : 2001:0:4137:9e76:1c53:1cd9:3f57:fe83(Preferred)
   Link-local IPv6 Address . . . . . : fe80::1c53:1cd9:3f57:fe83%13(Preferred)
   Default Gateway . . . . . . . . . : ::
   NetBIOS over Tcpip. . . . . . . . : Disabled

C:\Users\80063r>route print
===========================================================================
Interface List
 12...00 1c 26 c3 0f f2 ......Atheros AR5007EG Wireless Network Adapter
 11...00 1b 24 8b d6 5e ......Broadcom NetLink (TM) Gigabit Ethernet
  1...........................Software Loopback Interface 1
 14...00 00 00 00 00 00 00 e0 Microsoft ISATAP Adapter
 13...00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.1.1    192.168.1.124     25
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    306
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    306
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    306
      192.168.1.0    255.255.255.0         On-link     192.168.1.124    281
    192.168.1.124  255.255.255.255         On-link     192.168.1.124    281
    192.168.1.255  255.255.255.255         On-link     192.168.1.124    281
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    306
        224.0.0.0        240.0.0.0         On-link     192.168.1.124    281
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    306
  255.255.255.255  255.255.255.255         On-link     192.168.1.124    281
===========================================================================
Persistent Routes:
  None

IPv6 Route Table
===========================================================================
Active Routes:
 If Metric Network Destination      Gateway
 13     58 ::/0                     On-link
  1    306 ::1/128                  On-link
 13     58 2001::/32                On-link
 13    306 2001:0:4137:9e76:1c53:1cd9:3f57:fe83/128
                                    On-link
 12    281 fe80::/64                On-link
 13    306 fe80::/64                On-link
 12    281 fe80::184e:6f0d:876c:4dfc/128
                                    On-link
 13    306 fe80::1c53:1cd9:3f57:fe83/128
                                    On-link
  1    306 ff00::/8                 On-link
 13    306 ff00::/8                 On-link
 12    281 ff00::/8                 On-link
===========================================================================
Persistent Routes:
  None

C:\Users\80063r>tracert 192.168.1.136

Tracing route to 192.168.1.136 over a maximum of 30 hops

  1  80063r-Acer [192.168.1.124]  reports: Destination host unreachable.

Trace complete.

C:\Users\80063r>
I have been reading many threads on this forum and information on other sites and I've come no closer to a solution.
 


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#2
Either you have the router set to block pings universally or for either machine, or the remote 136 machine has a firewall that is blocking it.

After investigating those 2 possibilities, disable IPv6 in the network properties and disable IP Helper service, reboot.
 


#3
I don't know how to block or unblock pings on the LAN without using a firewall. Windows firewall is completely disabled and there is no other firewall installed. I use DD-WRT firmware on my router and I can't find a setting to block LAN pings, only WAN pings so just for giggles I allowed incoming WAN pings.

I did as you said and unchecked IPv6 in the wireless properties and disabled IP Helper service on both machines, and the problem persists.

On a side note, I did run a port scanner (Super Scan 4) and it found only 192.168.1.1 (the router) and 192.168.1.124 (this computer) by ICMP although the router sees several computers connected.
 


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#4
Run this on the local and remote machines. Copy/paste each line to an elevated command prompt, press enter after each, then reboot:

netsh winsock reset

netsh int ip reset C:\log.txt
 


#5
I ran those 2 commands on each of the 2 computers and each command completed successfully and stated that a reboot was necessary and I rebooted.

The situation is still the same as before (i.e. "Destination host unreachable.")
 


#6
Sure way to tell what is going on is to install Wireshark and watch the packets, on both machines.

Anyhow, what date does the wireless adapter driver show, in the device manager driver tab, for it.
 


#7
The Atheros AR5007EG (on laptop) has a driver date of 3/31/2010.
The TP-LINK TL-WN821N (on desktop) has a driver date of 7/24/2008.

I installed wireshark on both machines and ran a test capture and was able to capture some data while pinging and refreshing "Network", but I don't know what to do next.
 


#8
You could attach the logs. I'll see if I can pick up on anything.

Just name them corresponding to each machine...like 124 and 136.
 


#9
Here are the logs:

I had to rename them to .txt to allow upload.

edit: I just talked to my friend who's on the same network and he has computers that can see each other but can't see mine.
 


Attachments

Last edited:
#10
The problem is in the router settings or with the router itself.

Notice in the 124 log, the ARP lines asking who has 192.168.1.136 and there is never a response with that machine's mac address, like it should be.

So, there is a definite problem in that your 124 machine does not even know that 136 is up and running because of this. The router is not telling at all.
 


#11
What I'm willing to bet is that there isn't even an active machine on the network at all with the address 192.168.1.136.

Go to the machine that you think has that address, check that it is correct and then also check that it has net access at all with that address if you do find it is correct.
 


#12
It's a little crazy to go through all this just to find out that I had to unplug my router's power cord for 5 seconds and plug it back in. That should have been my first thought, but since I saw all the clients on the router's LAN status page... Anyway, all is well now. Maybe I'll check to see if DD-WRT has an update.

Thanks for the help.
 


#13
Sure thing, very welcome.

Well, at least you found out about a great new tool to have at your disposal. :)
 


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