[Gilbert Ramirez <gram@xxxxxxxxxx>]

On Mon, Oct 02, 2000 at 04:03:40PM -0600, Gerardo Ibarra Aranda wrote:
> Hello, I want see only the packages TCP and SMTP transmited between 2 
> computers, 200.13.110.240 and 200.13.110.241 for example. Somebody know how 
> I do that???.
> 
> Thank you.
> 
> Gerardo.

If the packets have already been captured and you are trying to
modify what is displayed on the screen, then you need a display filter of
the form:

ip.addr == 200.13.110.240 and ip.addr == 200.13.110.241 and (tcp or smtp)

If you're trying to capture only that type of traffic, then you need
a capture filter (in "tcpdump" syntax, which is really "libpcap" syntax,
but it's documented in the tcpdump manpage):

host 200.13.110.240 and host 200.13.110.241 and (tcp or port smtp)

--gilbert