One-way traffic on a network

Can anyone walk me through trying to fix my networking issue? Is that allowed in this section?

If so, I've got a computer connected to our network, and it's able to access all the other computers on the network, but trying to access it from the server and I get nothing. Even trying to ping it from the command prompt it times out. However, pinging the server from the computer it kicks back immediately. It's not a firewall issue because I've turned it off and still cannot connect to it from the server. I recently had to remove some scareware from this computer, and that's when the networking issue started.

Any ideas?

*ping*

Anyone?

ICMP enabled, DHCP enabled, firewall off. Nothing doing. Workstation sees everything on the network and can access shared folders and ping all other workstations. But the rest of the workstations and the server "see" the troubled workstation, but cannot contact it.

Perhaps a permissions issue? No inbound connections allowed or something like that?

Ok, you said "scareware" so that makes me think it could be a bug of some sort. Humor me & boot the workstation in question to safe mode w/ networking. now make sure it has an ip address. now ping the server ip from the workstation in question. now ping the workstation in question from the server. does it work?!? if so, great! you know it's something goofy in normal mode with windows. if not, then we may have a problem... Post back!

Can you connect to this problematic computer from other computers without any problems (ping?)?

Sorry for the late reply guys, in safe mode the problem computer does have an IP, but there is still no response when pinging the problem computer from the server or any other computer on the network, however the problem computer can ping all of them.

Also, when using the problem computer to access any shared files/folders/databases on the network, the response is generally agonizingly slow (4-5secs per change to the database).

Just a couple thoughts...

-Have you tried updating the network driver?
-Go into the device manager, go to view and select show hidden devices. Are there any items that have a red X or yellow !, be sure to check under non-plug and play drivers.

I've updated as well as completely uninstalled and reinstalled the network card drivers.

suggest we get the tcp settings;
get a command prompt and enter

ipconfig /all >myTCP.txt

then come back here and paste the contents of the myTCP.txt file.

How did those settings get set {DHCP or Manual editing}?

I'm assuming DHCP because before the malware issue we just plugged in created a user and had zero problems.

Windows IP Configuration

Host Name . . . . . . . . . . . . : WS301
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : NVIDIA nForce 10/100 Mbps Ethernet #2
Physical Address. . . . . . . . . : 00-21-97-62-8D-0B
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::d99:6b49:5e68:ee68%11(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.4(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Tuesday, June 12, 2012 9:32:32 AM
Lease Expires . . . . . . . . . . : Tuesday, June 12, 2012 4:02:32 PM
Default Gateway . . . . . . . . . : 192.168.1.254
DHCP Server . . . . . . . . . . . : 192.168.1.254
DNS Servers . . . . . . . . . . . : 192.168.1.254
Primary WINS Server . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::c3c:1e9b:3f57:fefb%10(Preferred)
Default Gateway . . . . . . . . . :
DHCPv6 IAID . . . . . . . . . . . : 184680532
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-10-F5-FE-85-00-21-97-62-8D-0B
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 7:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{B5E4605B-1CD7-4915-9174-53454E3FB697}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

OK, there are two steps to the resolution:

a) change the node type from broadcast to hybrid

[z] To set the NodeType:
using an admin login, run->regedit

find this key: [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters\]

add as necessary:

DhcpNodeType DWORD = 1

NodeType DWORD = 8

b) disable IPv6

see http://support.microsoft.com/kb/929852

save and reboot

When the system has rebooted, delete the existing network connection {Home, Public, Work}
and recreate it to set the firewall correctly.

The next step we might need is the display of the routing table, but let's see how far this takes you.

did the first two things, how do I delete the network connection?

control panel -> Networking & Sharing Center
On the line --View your active networks--- click Connect or Disconnect

sorry, I probably look like an *****, this is my view.



Under manage connections it brings up this, but right clicking doesn't give me disconnect as an option, just "disable", is that what I'm doing?

ok, I'm on Win/7 and the display is different.

In the first view <manage network connections>; click and see if you can delete it.

then come back to it and <setup a network connection or network>

still not available, tried disabling it to see if it would un-grey "delete"

You would have to uninstall, then re-install the adapter using the Device Manager.

wrong window ; on this view http://www.techspot.com/community/attachments/view-jpg.72798/

manage network connections and then create a network

bump; what is your current status????