Wireshark · Wireshark-users: Re: [Wireshark-users] Wireshark Not Listing anything for TCP

[Jaap Keuter <jaap.keuter@xxxxxxxxx>]

Hi,

Are you connected to a switch? Probably yes.
That prevents any traffic (not just TCP, but all unicast) not destined for
the capture machine from being captured. That is the very nature of a
switch.
To solve this most switches let you define a monitor port which does get
to see this traffic.

Thanx,
Jaap

On Thu, 12 Oct 2006, Tara Parker wrote:

> We try to run a capture, but are not seeing any TCP traffic.  We can
> only see it if we browse the internet from the actual machine that
> Wireshark is loaded on.  We tried playing with the filters, but are
> stumped.  Can someone please help out a couple of newbies?
>
> Thanks,
>
> Tara
>