Networking – How to troubleshoot ping request time out

pingwireless-networking

I have a Windows 7 and an XP machine connected to a NETGEAR wireless router. Both machines can log into the network and surf the web. Both are connecting wirelessly.

I can ping the router from each machine and get a reply.
I can ping each machine from the router and get a reply.
But i cannot ping each machine from the other; getting a request time out.

Subnet IP Addresses are 192.168.1.*
Router =1;
Win7 = 10;
XP = 11;

Firewall is currently off in both systems. Since i can ping from router im picking that not the problem anyway.

If i try to ping from xp to win7 i get Request Timed Out.
If i try to ping from Win7 to Xp i get destination host unreachable.

What should i do now? Thanks

Best Answer

k. Ive sorted the problem.

When i used some cat 5 on the XP machine i was able to ping it, but still couldn't ping to the Win7 machine. When i cat 5 the Win7 machine i could then ping that.

It was a router based setting. Wireless Isolation was enabled.

I saw it earlier but thought it meant something else but it actually means isolate the individual machines within the subnet from each other so you cant even ping machines on the same subnet. Seems an odd default but is kinda cool. ;)

Not sure if i should delete the post or not?

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Windows – Window 8 machine cannot ping devices on same subnet

Seems like your devices are not responding to ping requests. That does not mean they are not reachable.

http://mikemstech.blogspot.co.uk/2011/10/how-to-enable-ping-response-on-windows.html

Ping IP returned “destination net unreachable”, even with different network

What your commands show is the following:

Your computer has resolved www.facebook.com address to be 69.171.228.14
It is trying to send ping packets to it
On the packet's way a router (possibly your's, at address 204.15.23.57) cannot find route to 69.171.228.14
So that you know about this the router 204.15.23.57 is informing you about this with the ICMP reply message Destination net unreachable.

In your second command you are pinging the router who gave you net unreachable reply, not facebook host, therefore unsurprisingly you get a reply from it.

As you have helpfully pointed out - this was result from a messed-up hosts file. You also could have seen the problem if you had used nslookup to query a DNS server directly:

nslookup
server 8.8.4.4
www.facebook.com

This would have shown you the actual address of the facebook host and you would have noticed that it is different from the one given to you (69.171.228.14 ), so you would have known to look in the hosts file as a computer resolves IP addresses through hosts file or DNS queries.

Having said that it is not good that a virus has been able to update the hosts file, since that should only be writable by a superuser/system (Administrator, SYSTEM or root on Linux). Therefore the implication is that the virus/trojan had high level access to the system.

Best Answer

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Windows – Window 8 machine cannot ping devices on same subnet

Ping IP returned “destination net unreachable”, even with different network

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