Wireshark · Wireshark-users: Re: [Wireshark-users] need to find what blocks icmp

[Kok-Yong Tan <ktan@xxxxxxxxxxxxxxxxxxx>]

Make sure there isn't a third party firewall installed on the  
machines that nobody thought to tell you about.  This may sound  
stupidly obvious but I once had a similar issue and already had the  
Windows firewall off on the machine so I couldn't figure out why  
nothing seemed to be connecting.  I later noticed that the user had  
self-installed (without informing me) a third party firewall and it  
was causing all my grief.  Even he had forgotten he had installed it,  
let alone documented the fact.  Never underestimate the trouble a  
user/junior administrator with admin access can get up to...

On Aug 19, 2009, at 23:52, Boris Blinchevsky wrote:

> Windows Firewall is off on both machines.
>
> -B

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