CT320 Lab Configuration                

Overview                

CT320 labs (recitations) are held in CSB room 315. CT320 uses the workstations around the perimeter of the room—not the center ones. CT320 workstations have pink labels on their monitors. It’s ok to have two students to a workstation, but no more than two.                 

Users & Passwords                

• Each machine should have a user ct320, with a name of “CT320 User”, and password “ct320”. It’s a horrible password, but security isn’t an issue, here.
• There is a root (super-user) account, but it has no password. You can’t log in as root, but must log in as ct320 and use sudo to do things that require super-user privilege.

Network configuration                

192.168.110.0/24 network

The IP addresses for this private network are of the form 192.168.110.suffix, where suffix is 0–255 (more or less).

Netmask 255.255.255.0

Gateway 192.168.110.1

The gateway is an IP address of a router or computer that provides a route to the world outside of this network.

Machines are named ct320-1, ct320-2, etc.

Per the pink tag on the monitor.

Static IP addresses

The static IP address for ct320-suffix is 192.168.110.100+suffix. For example ct320-4 is IP address 192.168.110.104. Why 104, rather than just 4? Because the address 192.168.110.1 is already used for the gateway.

Search domain

Specify cs.colostate.edu as a search domain, so we can use acushla instead of acushla.cs.colostate.edu.

Services                

The lab has a serious network firewall; only certain services are permitted.                 

No DHCP

There is no DHCP server on this network. (OK, sometimes there is, but we don’t want to use it.) Therefore, static IP addresses (see above) must be manually assigned.

DNS server is 129.82.45.181

The DNS server translates names (e.g., denver.cs.colostate.edu, amazon.com) to ip addresses (129.82.44.141, 98.87.170.74). You must specify the DNS server as an IP address, not a name. If it were a name, who would translate it to a number?

http/https

Web browser access (http: and https:) works to the general Internet. Network OS updates work, because they use http protocol.

ssh/scp

ssh is only permitted to the host acushla.cs.colostate.edu. It has all your files on it, just like the CS Department computers in CSB 120. However, if you need access to other computers, you can first ssh to acushla, then ssh to where you need to go from there. If ssh to acushla fails, then ssh to 192.168.110.1.

ping

Pinging anywhere should work.