Pinging computers

[Dominican0]

I am having a problem pinging my computers. They are hooked up on a router, and share an internet connection through the router. I can ping both computers from the one upstairs, but from my main one down here, I can only ping itself, I cannot ping the other one upstairs. I just disabled the WinXP firewall on both, and stil the same problem. Anyone have any suggestions on what could be happening???? Thnx, plz anything will help!!! Its really needed...

[Jon]

Post ipconfig /all results for each PC.

[Dominican0]

Ok, here is the main computer (the one where I cannot ping to other one from)

I will post the other one in a minute, i have to go upstairs and check it.....

[Dominican0]

and here is the other computer...

[Jon]

The only thing that catches my eye there is the mention of IPSEC. If ipsec is running on an adapter, it'll reject non encrypted traffic (depending on its mode).

Show us shots of the ping that works, and the one that fails

[Dominican0]

ok, this is the NON working one....

[Jon]

And 51 can ping 25?

[Dominican0]

and this is the working one

[Jon]

I'm confused, can u edit those last 2 posts to say the source machine, that you're typing ping xxx on please?

[Dominican0]

yes, 51 can ping 25 and 51.....but 25 cannot ping 51

[Dominican0]

sure, give me a minute

[Jon]

Am I right in thinking 25 is using a VPN?

[Dominican0]

This is the main comptuer thats not working properly...and I am not using a VPN right now, I was trying to do that before to connect to my school, but it didnt work so i disconnected from the VPN, and unless theres a hidden form of VPN, i do not believe its behind one.

[Dominican0]

and here is the working one...."51"

[Jon]

Hm, well the TCP/IP config looks correct, the only fishy thing is the VPN.

Some VPN clients will firewall a connection, allowing through only the encapsulated+encrypted data (ie: on one port). This may be happening, which would explain why you could ping out from 25, but not back in (stateful awareness).

I'd try removing the VPN client.

Edit: The pings are going the wrong way for that theory, but I'd still try ripping off the vpn client.

[Symbiotic Hat]

If you are using any type of special VPN software, such as Cisco's VPN software, uninstall it and reboot then try again. I had a problem similar to this this weekend and the VPN software was the culprit

Good Luck

Jeavis

[Dominican0]

How can i do that, b/c the only VPN that I know of, I use a program called "Nortel Networks" to connect to....and right now, that is totally disconnected.

*edit* ill try that now...

[Jon]

Add/remove programs, prolly sumfin in there.

[Dominican0]

its still not working after uninstalling and restarting =/

[Symbiotic Hat]

Check your network protocols and see if there is anything out of the ordinary running. besides .....

If that doesn't help you should try running msconfig and going to the startup tab and uncheck all the boxes .... just remember which ones you unchecked. Reboot and try again

[Jon]

Specifically look for IPSEC related settings.

[Dominican0]

nope =/

*edit* what about on the computer thats working both ways...should i check that one for the same thing?

[nu-cleer]

In your Network Connections window, do you have an icon stating "Virtual Private Network"? If so does it indicate active or disabled?

[Dominican0]

nope ...

[nu-cleer]

on your 51 machine in network connections, check the "enabled" Local Area Connection..click>properties...then highlight TCP/IP protocol then>properties>advanced......and see if in the box that"DHCP" is enabled