Host-Scanning (combined programming/written assignment)

This assignment is to scan chadash.cs.columbia.edu and let me know
what you can learn.

Using the tools discussed in class, learn the following:

a) What TCP ports are open?

b) For at least one open port, what version of what program is
running?

c) For any two of the open ports, what are the security implications
of this port being available over the Internet?

Note: because there are some potential security issues with the
way the machine is configured, it is *only* accessible from Columbia
networks.  If you want to work from elsewhere, you'll have to log
in to one of the CLIC machines first.

You do not need root privileges to do this assignment.

Once you've identified an open port, Googling for information on
it is helpful.  It is also useful to use the 'telnet' or 'nc'
commands to connect to the port and send data to it.

You may find the 'script' command useful to keep track of what you're
doing.

Deliverables:
	A transcript (or equivalent) showing what commands you used,
	and what the output is.

	Discussion of what you have learned.

	Answers to the three specific questions given above.

If you know of other tools or techniques, you're free to aim them at
chadash.  You MUST NOT poke at other machines without permission!