I discovered over the past couple of days (early Sep 2008) that putting people
through working interviews is way too much fun
This is intended for high-level unix sysadmins, but here's what I
I broke /etc/nsswitch.conf, /etc/network/interfaces (Debian box),
and /etc/resolv.conf, leaving the good values in those files with
very obvious comments, because this isn't a test of "can you
psychically guess our network layout".
Rebooted the box, consoled in, added iptables commands to block port
22 both ways and icmp, using -j DROP.
Sat interviewee down in front of root console and said "ssh to FOO
(a local shell server); FOO is up and running with ssh, and the
network is fine. Go."
The iptables bit was the hard part. Both people I've done this to
needed a bit of a hint for that, but that's OK, IMO, as "machine has
stupid-ass iptables rules" isn't exactly a common scenario.