I'm using the Slast live CD to test the Asterisk PBX. I need to run a
packet sniffer on that same host (I'm using a switch instead of a hub)
to investigate a problem I have with a remote SIP device.

Do you know of a self-sufficient packet sniffer that I could just copy
to a USB key, and then copy it into the host's RAM? I'm an
intermediate Linux user, so it'd have to be something not too
technically involved.

Thank you.