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Windows 7: Can't ping localhost over IPv4 only IPv6


09 Jan 2012   #11

Windows Server 2008 R2
 
 

Can you disable (as previously) the IPv6 components on both, and then ping -4 again whilst gathering a network trace on "Prague" via wireshark? DNS appears to be working, but it'd be interesting to see what's happening on the wire. Is it safe to assume firewalls are currently disabled while testing right now on both ends?

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09 Jan 2012   #12

Windows 7 Ultimate x64
 
 

Thanks - will do that now. How would you like the trace sent to you? Shall I just upload it somewhere, or can I DM or email it to you?
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09 Jan 2012   #13

Windows Server 2008 R2
 
 

Zip and upload it somewhere, and link it here, if you would please.
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09 Jan 2012   #14

Windows 7 Ultimate x64
 
 

OK it's here for a short period of time. http://dl.dropbox.com/u/9379658/ping_request.pcap
Will remove it after you have taken a look.
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09 Jan 2012   #15

Windows Server 2008 R2
 
 

I have it, reviewing now.
My System SpecsSystem Spec
09 Jan 2012   #16

Windows Server 2008 R2
 
 

Indeed, no responses to ICMP requests, or even SYN requests to create a session. I do see that IP address sending broadcast browser messages and DROPBOX discovery protocol broadcasts, which is odd. Are you certain the firewall is disabled on 192.168.1.64?
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09 Jan 2012   #17

Windows 7 Ultimate x64
 
 

Firewall is disabled on 'London' (Laptop) for private networks (which it is on). Dropbox client was running in the background so that makes sense to see those broadcasts I guess. Anything else that I can run/test?
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18 Jan 2012   #18

Windows 7 Professional 64 bit
 
 

Hi,
i had exactly the same problem (but i needed some frustrating hours to locate it.. first i only tried to find out why remote desktop doesnt work. None of the solutions worked of course because the problem was the IPv4 ping..)

The solution for me was quite specific: I had the program "Checkpoint Endpoint Security" installed. After i uninstalled it, pinging on IPv4 worked again. YAY!!

Just switching Endpoint Security of didn't work, because apparently Endpoint Security automatically installs a firewall which keeps running even if the program itself is switched off.

I then reinstalled the program with INSTALL_FIREWALL=NO from the command line. Now pinging and remotedesktop work, even if Endpoint Security is installed and running.

Don't know if this helps anyone, but if you dont have the program installed, maybe its another little program that blocks the pings, and not a problem in your network configuration.
My System SpecsSystem Spec
18 Jan 2012   #19

Windows 7 Ultimate x64
 
 

thyman - you are a star!
That only went and worked. I had Checkpoint Endpoint VPN client installed, and when I removed that it worked!
RemoteDesktop now works, as does ping!
Thank-you once again.
My System SpecsSystem Spec
09 Mar 2012   #20

Windows 7 Home Premium 32bit
 
 

Hi there,
I had the same problem. Symantec Norton 360 was the problem. All I had to do was to tun Norton Removal Tool and all was good then. Download it from Symantec servers here:
https://www-secure.symantec.com/nort...=1&pvid=f-home
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 Can't ping localhost over IPv4 only IPv6




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