Wireshark-users: Re: [Wireshark-users] need to find what blocks icmp
Make sure you disable the Windows firewall?

--- On Wed, 8/19/09, Boris Blinchevsky <[email protected]> wrote:

> From: Boris Blinchevsky <[email protected]>
> Subject: [Wireshark-users] need to find what blocks icmp
> To: [email protected]
> Date: Wednesday, August 19, 2009, 12:42 PM
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> Hello,
>  
> 
> 
>   
> 
> Trying:  To
> find out what blocks ping from laptop to
> desktop. 
> 
> Have:   
> 2 computers. 1. Dell M140 laptop ( Comodo firewall,
> Symantec Enterprise Edition
> 11.0)   IP   192.168.1.3  
> subnet 255.255.255.0 
> 
>                                
> 2. Dell desktop (Comodo firewall, Symantec Enterprise
> Edition 11.0)  IP   192.168.1.2  
> subnet 255.255.255.0 
> 
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>   
> 
> Issue:  I
> can
> ping laptop from desktop, but I can not ping desktop from
> laptop. Both comps
> have tcp/ip configured correctly. Both computers have can
> ping linksys router
> (192.168.1.1) and Internet addresses. 
> 
> What I did for
> test
> purposes: 
> 
> 
>   
> 
> I connected
> laptop (192.168.1.3)  directly (via ethernet cable) to
> the desktop
> computer (192.168.1.2). The ping still times out from the
> laptop to the
> desktop, but it works the other way around. I did check arp
> table on the laptop
> & desktop. Both are able to see each other's
> MAC's addresses. I also
> disabled Comodo firewall on both computers (selected exit
> on the task bar
> tray). Symantec Endpoint protection firewall was also
> disabled by stopping all
> Symantec services under Windows Services. Still doesn't
> work. I'm pretty sure
> now that the problem is on the laptop, because I tried
> combination of pings
> from each computer to each other with 'netstat -s'
> option to see wich one is
> not receiving ICMP echos and which one is not sending back
> ICMP echo replies.
> Desktop is not receiving icmp echos from the laptop and
> laptop, obviously, not
> receiving replies. I did try to stop as many services under
> Task Managers as I
> could just to see if that would help... but still no
> luck. 
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> Sniffer:
> I
> installed WireShark sniffer. I do see source and
> destination, protocol and info
> in Wireshark window when I ping from laptop to desktop. The
> only packets it
> captures are ICMP Echo (ping) request.  So, what I do
> now? How I can find
> out what application blocks ICMP
> packet?? 
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> Thank
> you! 
> 
> Boris
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> -----Inline Attachment Follows-----
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