Wireshark-users: Re: [Wireshark-users] Capturing the gateway

From: Kok-Yong Tan <ktan@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 6 Apr 2008 16:01:09 -0400

On Apr 6, 2008, at 14:20, RD wrote:
Stephen Fisher said the following:
  you will need a hub or Ethernet tap and connect
it in between the Airport and the DSL modem.


thanks or the reply. There _is_ an Ethernet cable from the Extreme to the DSL
Modem. And that's how the MacBook gets to the Internet.

What Stephen Fisher means is that you need to "hub out" (to use a Laura Chappell term--Laura was one of the presenters at the recently concluded Sharkfest 2008). It's already obvious you have an ethernet cable connecting your Extreme to your DSL modem. You need to see what packets are going between the two and the only way is to insert a hub between the two--that's what Stephen Fisher is telling you.

A long time ago, using Wireshark, I remember seeing "en0" as a choice. Now
it's en1 only ...

FYI:
---------------------------
rd$ ls -l /dev/bpf*
crw-rw----   1 root  admin   23,   0 Apr  6 11:16 /dev/bpf0
crw-rw----   1 root  admin   23,   1 Apr  6 11:09 /dev/bpf1
crw-rw----   1 root  admin   23,   2 Apr  6 11:09 /dev/bpf2
crw-rw----   1 root  admin   23,   3 Apr  6 11:09 /dev/bpf3


Why not just use "ifconfig -a" to find out what interfaces are available and active?
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