hardbound resources

[J.T. Davies]

There's a couple of book names floating around as suggested reading for
designing firewalls and understanding the various states of packets (ack,
syn, fin, rst)...but for the life of me, I can't remember the title of a
specific one. :)
 
I believe it was an O'Reilly book, and it was generic (not specific for
FreeBSD or other O/S)...
 
Can anyone throw some titles out that may jingle a bell in my mind so I can
go buy it?

Thanks!!
J.T.