ubuntu post installation hardening

[loner]

> I wonder how many people have computers connected directly to the
> internet these days? I personally don't know anyone that is not on DSL
> or cable, and connect via a router, which does NAT, and makes
> accidental inbound connections difficult. But maybe thats not as
> common as I think it is.

Some people (e.g. me) share Internet connection, and then you start
thinking about neighbours... firewalls... etc. ;)

--loner