| Aharon,   The short answer is that you need to put quotes around 
your filter      -f "ether proto 
0xff00"   The reason why you didn't see the error message was 
because you used the -Q option. -Q killed ethereal immediately after the error 
was displayed. (Guy/Gerald etc Is this a bug or a 
feature?)   If you 
really want the command line options you're choosing, perhaps you would 
be better off using "tethereal" 
rather than ethereal? You get to see your error message and you wont need to 
worry about -Q and -k. Unless you machine has multiple NICs you probably don't 
need the -i option either. Just tell Ethereal which NIC to use by default in 
Edit->Preferences->Capture select your normal NIC for tracing then click 
some combination of Apply/Save/Close in order to get this to 
work.   HTH   Alistair 
  
  
  
  Hi, I am using the ethereal software 
  and I need help with working from command line.  I runt the following 
  command: ethereal\ethereal -c 1000 -i 
    \Device\Packet_{7AC24860-39CA-4439-A2E0-6261FE644D93} -k -w test 
  -Q  and it worked ok, I tried to add a 
  filter to the command: -f ether proto 0xff00, the ethereal application was 
  opened and closed immediately without capturing and 
  saving file.    
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