Receive an IP from the router but cannot ping the router

Hi Guys

Problem:

I have a 2 pc network, a normal ADSL router connects the 2.

On PC1 I can connect to the internet and can ping the router.
On PC2 I can also connect to the internet but cannot ping the router ( I can even connect to the router's IP via the web browser )
Both machines are getting an IP from the router just fine.

What I think the issue is, IP routing is enabled on PC2 but I cant seem to disable it, I have already tried the reg hack but it still says enabled.

This is the IPCONFIG of PC2, also see attachment

icrosoft Windows XP [Version 5.1.2600]
© Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\NFP Planner.MAYAPC>ipconfig/all

Windows IP Configuration

Host Name . . . . . . . . . . . . : PA600662
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Mixed
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection 6:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 00-21-85-96-B2-28
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 10.0.0.4
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Default Gateway . . . . . . . . . : 10.0.0.2
DHCP Server . . . . . . . . . . . : 10.0.0.2
DNS Servers . . . . . . . . . . . : 10.0.0.2
Lease Obtained. . . . . . . . . . : 02 February 2011 1:13:29 PM
Lease Expires . . . . . . . . . . : 03 February 2011 1:13:29 PM

C:\Documents and Settings\NFP Planner.MAYAPC>ping 10.0.0.2

Pinging 10.0.0.2 with 32 bytes of data:

Destination host unreachable.
Destination host unreachable.
Destination host unreachable.
Destination host unreachable.

Ping statistics for 10.0.0.2:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\Documents and Settings\NFP Planner.MAYAPC>

The other PC can ping the router and gets a response.

at a guess, the router responds to the first pc because that is the admin pc, but for all other pings it doesn't respond, it is a security feature of the router not to respond when pinged, so hackers can not know there is a pc at the pinged ip address, can be turned off in router usually, but not recommended. and if you can connect to the internet just fine with all pc's it's something i really wouldn't worry about. also if i were you i'd edit your post and put x's where your ip address is and never post it again in any forum. why advertise where you are to the bad guy's.

Hi Terry The problem I am having is that I cannot ping the IP of the other PC and therefor cannot connect to any network shares or printers. The IP addresses in the original post is only local LAN addresses so no hackers can get to me with that information. I think if I can figure out how to disable this IP ROUTING thing it will all work perfectly.

sorry, i'm more used to seeing local router networks with 192.168.x.x ip address' my knowledge of networks is very very limited, but think the first thing i'd try is to disable any firewalls on the pc's and see what results you get then.

Try this:

Network and Dial up connections
Choose Properties of incoming connections
Networking Tab
TCP/IP
Properties
Disable access to Lan checkbox.

From here: http://www.computing.net/answers/windows-x…rding/7941.html - post #3

Hi ZTruker I am using windows XP and cant find those directions. I suspect those directions are for windows 2000. The only directions I found for XP was the reg hack which I have already done, but it still says enabled.

Ok, I am out of ideas, is there any other way to disable IP Routing on windows XP besides the reg hack. I am probably looking at reinstalling windows now.

Is this the registry hack you used?

To enable TCP/IP forwarding, follow these steps:

1. Start Registry Editor (Regedit.exe).
2. In Registry Editor, locate the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
3. Set the following registry value:
Value Name: IPEnableRouter
Value type: REG_DWORD
Value Data: 1
A value of 1 enables TCP/IP forwarding for all network connections that are installed and used by this computer.
4. Quit Registry Editor.

Only set the value to 0?

What response do you get if you enter the following from a Command Prompt:

reg query "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters"

On my XP, I get

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
NV Hostname REG_SZ VirtualXP-26583
DataBasePath REG_EXPAND_SZ %SystemRoot%\System32\drivers\etc
NameServer REG_SZ
ForwardBroadcasts REG_DWORD 0x0
IPEnableRouter REG_DWORD 0x0 <=========
Domain REG_SZ
Hostname REG_SZ VirtualXP-26583
DeadGWDetectDefault REG_DWORD 0x1
DhcpNameServer REG_SZ 192.168.2.1
DhcpDomain REG_SZ router

I had the same issue and it turn out to be a router firmware update. I have a Netgear wnr 2000 - all my devices were working fine and one of my kids desktop started having this problem. I tried a couple of diferent wirless usb wirless cards and it did not work. I rolled back the firmware on the router and everything when back to working. I think the firmware was not compatible with wireless N that is the only thing I found in common, maybe bug not sure.

Hi Terry

The problem I am having is that I cannot ping the IP of the other PC and therefor cannot connect to any network shares or printers.

The IP addresses in the original post is only local LAN addresses so no hackers can get to me with that information.

I think if I can figure out how to disable this IP ROUTING thing it will all work perfectly.

Hi,
I think your router will not work properly.So you can reset your router and then you can do ping test for google.com or any Ip address using cmd prompt or using free online sites like Whoisxy.com.Again you get a problem means better you can replace your router or upgrade your router…..