In the pf scripts submitted here for review or help, I've noticed a few times rules that involved the loopback interface (i.e. lo0). In the pf FAQ and How-To I've read, this isn't mentioned. What sorts of setup or uses would call for such rules?
Also, for any of you who haven't seen it, may I call your attention to this
nice explanation of pf syntax:
http://www.cs.colorado.edu/~tor/saclass-2002/tcpip/pf.html
This list has been very helpful. Thanks to you all.
