I am in the process of setting up Websense (internet access filtering) with my Pix firewall. One of the step in the Websense setup is to set up a SPAN port on my core switch, so that Websense can monitor all traffic. I have not set up a SPAN port in the past and I am looking for some guidance. The Websense server is connected to port 20 on blade 3 of the switch. All the the SPAN documentation I read speaks of configuring two ports (one being where the sniffer is attached, which in may case in the Websense server) but I don't understand what the second port needs to be.
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