I have the luxury of 2 BM servers. On the one, I want to completely delete
all the filters and rebuild from scratch - lots of unneeded, old stuff in
there, and I want to simply put in what I _know_ is needed and wait to get
asked for the rest.

To that end, I copied filters.cfg to my home dir and have been looking over
a printed copy. It seems that everything I need is in there - is there
anything else I should preserve before doing this?

I'm probably also going to replace the NIC for the public side, so I thought
I might swap the NIC, put things right in INETCFG, then go about rebuilding
the filters.