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Vista PC Dropping ICMP Echo Packets in Private Network


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#1 SilverTop3020

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Posted 25 January 2014 - 12:25 PM

Hi guys, I have joined Bleeping Computer because I really do believe the PC support on here is the very best on the Internet.

 

I have 2 Vista PCs both with networked shared drives. The network is Private.

 

Three weeks ago I found I could no longer ping from Computer1 to Computer2 and yet the other way works fine. I also have 2 laptops that can no longer ping to Computer2.

 

I have no idea what has changed on Computer2.

 

After weeks of research, comparing Windows settings between PCs, resetting the router, checking ZoneAlarm, services that should be running, resetting winsock, running SFC, etc, etc I have found that even if both PCs are started in Safe Mode With Networking I still cannot ping to Computer2 from Computer1. The other way is ok still.

 

I switched on Windows Firewall on Computer2 and can see in the log that ICMP Echo requests are being dropped (not blocked as I expected):-

 

2014-01-24 16:18:36 DROP ICMP 192.168.1.66 192.168.1.72 - - 60 - - - - 8 0 – RECEIVE

 

192.168.1.66 is Computer1 and 192.168.1.72 is Computer2.

 

Changing various Windows Firewall settings including adding Inbound and Outbound Rules for ICMP has made no difference.

 

I am convinced that the problem is with missing/wrong ICMP registry keys or permissions. I have now run out of ideas and would desperately appreciate any help.



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#2 JohnC_21

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Posted 25 January 2014 - 01:18 PM

Just a couple of ideas.

 

Unlikely but is the computer ip in the Hosts file?

 

You reset Winsock. Did you try resetting the TCP/IP stack.

 

Cmd with admin privleges.

 

netsh int ip reset c:\resetlog.txt



#3 SilverTop3020

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Posted 25 January 2014 - 01:33 PM

Hi there John.

 

1)  The hosts file :-

 

# Copyright © 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

127.0.0.1       localhost
::1             localhost

 

2)  I ran  "netsh winsock reset", but that didn't fix the prob;em, so I ran KB811259 FixIt for the Winsock, but that didn't work either.

 

3)  I have admin priviledges on my own PCs.  I only have 1 user on each.

 

4)  I tried "netsh int ip reset c:\resetlog.txt" on Computer2 but I got back  "Reseting Echo Request. Failed. Access is denied" followed by some ok messages.



#4 SilverTop3020

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Posted 25 January 2014 - 01:37 PM

I also ran KB299357 FixIt to reset TCP/IP, but again no joy. 

 

I have 4 pages of notes on what I have tried. It's turning into War And Peace...



#5 SilverTop3020

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Posted 27 January 2014 - 08:29 AM

2 days now and no-one else got any ideas ?

 

I just need to know how to stop Windows Vista SP3 (even in Safe Mode) from dropping ICMP Echo requests instead of replying to them.

This is in the Windows Firewall Private log:- 

 

2014-01-24 16:18:36 DROP ICMP 192.168.1.66 192.168.1.72 - - 60 - - - - 8 0 – RECEIVE

 

Surely someone who works for Microsoft Networking knows more than me, although I am beginning to doubt it.



#6 JohnC_21

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Posted 27 January 2014 - 09:20 AM

You might have better luck posting in the Networking Forum.

#7 SilverTop3020

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Posted 27 January 2014 - 10:55 AM

Thanks John for the suggestion. The trouble is although my problem is on a Vista system, I don't know whether it's a network issue, firewall issue or a registry issue and this forum has a separate section for each.  I'll do as you suggest.






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