Best practices: changing ISP

[George Mitchell]

So for a while I'll have service from two ISPs, and hopefully anyone
who connects to my old external address will get a response from that
address, and anyone connects to the new address will get a response
from there.  Internally, my gateway is a FreeBSD box using "pf" with
NAT in the kernel, and my old ISP on one ethernet interface and the
new ISP on another one.  Has anyone written up a cheat sheet somewhere
that I can review?  What are the gotchas I'm going to run into?  To
begin with, I've set all my DNS TTLs to 300 to discourage people from
caching the old address for too long.  Thanks for any pointers.
-- George

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