[Herts] read-only cat5 cable

tony.tibbenham at sonoco.com tony.tibbenham at sonoco.com
Wed Jan 7 18:07:08 GMT 2004


> But the first thing he asked was, can you get one way CAT5?
The link reveals all.

It is done by creating a cable with non-standard wiring so it can receive
but not transmit packets.
Such a cable enables sniffing of traffic outside the firewall without the
promiscuous [listening] interface responding to layer 2 requests (e.g.
arp).  Having no IP address and a normal cable is often 'good enough' but I
thought the read-only cable was such a novelty it was worth mentioning.

Forward my messages by all means.  Encourage your admin to join the list.



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