[Jeff Morriss <jeff.morriss@xxxxxxxxxxx>]

sara vanan wrote:
> I saw that today only and I tried executing in Linux OS but it gives 
> error( Invalid filter).

Note that "dns && ip.addr == 192.168.16.67 && ip.addr == 192.168.16.106" 
is a *display* filter which is different from a *capture* filter.  E.g., 
you can type it into the filter field in Wireshark or use it with the 
"-R" command line argument to Wireshark or 'tshark' but you cannot use 
it with the "-f" argument to either program.

HTH,
-J