While working with a FreeBSD system this afternoon, I did something which killed
natd (the NAT daemon), which was processing packets in the usual way via ipfw
and a divert socket.
The result? Network communications on the system simply went dead.
It seems to me that ipfw should be able to "self-heal" (that is, bypass the
rule) or reinvoke a daemon that's attached to a divert socket. Otherwise,
the process that's attached to the socket becomes an Achilles' heel for
the whole system. Crash it for any reason, and the system's offline.
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