[Arnt]

NAT works for some use cases, not so well for others.

I know a database that's updated every night via a server-to-server connection that passes five levels of NAT, and when that crontab broke someone had to fix it by finding and correcting a bug in a 1500-line NAT configuration on one important router where the consequences of a mistake would be very bad indeed.

It works in the sense that the database is updated, but I cannot help thinking of Truth 3 in RFC1925.