[Guy Harris <gharris@xxxxxxxxx>]

Jeff Davis wrote:

> This is the error message:
>
> "net" was unexpected in this context.
>
> The following display filter isn't a valid display filter:
> (dst net 187 or tcp dst net 197)

tcpdump agrees with Ethereal:

	$ tcpdump -d '(dst net 187 or tcp dst net 197)'
	tcpdump: WARNING: en0: no IPv4 address assigned
	tcpdump: 'tcp' modifier applied to host

although it really means "'tcp' modifier applied to net" - TCP has 
neither hosts nor nets, those are properties of IP.

There's also *another* problem that I suspect is due to the filter being 
long (the error message might be too long), so it might be that no 
syntax error is displayed for your really long filter - but the long one 
gets the same error from tcpdump as '(dst net 187 or tcp dst net 197)' gets.

Try "dst net 0 or dst net 1 or..." instead.