IP addresses

From NNML

Contents

Lab IP addresses

  • Our Network: 192.168.29.0
  • Gateway: 192.168.29.1
  • Reserved for switches and routers: 192.168.29.2 - 192.168.29.9
  • The block of static IP addresses for us to use: 192.168.29.10 - 192.168.29.99
  • The block of dynamically assigned addresses used by DHCP: 192.168.29.100 - 192.168.29.254 (See below for allocation)
  • Broadcast 192.168.29.255

If your machine is configured to automatically obtain an IP address, then it will broadcast a packet requesting one from a DHCP server. We used to run our own DHCP server, but as of 12/9/09, the sysadmins now run a DHCP server for us. It will assign an address in the dynamically assigned range.

If you want your machine to be accessible from home, you need to use a static IP address. Pick one in our static block that no one is using, and update the list below. Then, you need to ask the sysadmins to assign a DNS entry for your IP address, and to unblock appropriate firewall ports.

Here's an example /etc/network/interfaces file for a static IP address:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.29.11
gateway 192.168.29.1
netmask 255.255.255.0
network 192.168.29.0
broadcast 192.168.29.255

Here's an example /etc/resolv.conf file:

domain cs.byu.edu
search cs.byu.edu
nameserver 128.187.80.20
nameserver 128.187.80.21

Table of static IP addresses

Static IP DNS name User
192.168.29.10 axon.cs.byu.edu Lab Web Server
192.168.29.11 rib.cs.byu.edu Joseph Heydorn's Workhorse
192.168.29.12 satay.cs.byu.edu Mike Smith
192.168.29.13 brisket.cs.byu.edu Dean Lebaron
192.168.29.14 wings.cs.byu.edu Chris Workhorse
192.168.29.15 lobe.cs.byu.edu Lab backup server
192.168.29.16 deepthought.cs.byu.edu Lab Printer
192.168.29.17 whopper.cs.byu.edu Robert Stromberg
192.168.29.18 nachos.cs.byu.edu Mike Brodie
192.168.29.19 David Norton
192.168.29.20 steak.cs.byu.edu DML MS SQL Server (Scott Burton)
192.168.29.21 tony.cs.byu.edu The Atlas Workhorse
192.168.29.22 Aaron Dennis
192.168.29.23 Elham Vaziripour
192.168.29.24 waiter.cs.byu.edu Chris Tensmeyer
192.168.29.25 tofu.cs.byu.edu Mike Smith' workhorse
192.168.29.26 lasagna.cs.byu.edu NNMLC1
192.168.29.27 Aaron Dennis
192.168.29.31 fish.cs.byu.edu Joseph Heydorn
192.168.29.38 Steve DML
192.168.29.42 Chris DML
192.168.29.44 Brandon DML
192.168.29.45 cream.cs.byu.edu Logan Mitchell
192.168.29.47 Laurence Glazier DML
192.168.29.52 darci.cs.byu.edu Dave and Daryl
192.168.29.55 ghoti.cs.byu.edu Dave's old computer
192.168.29.59 Jake DML
192.168.29.62 - 192.168.29.95 nnmlc2 - nnmlc35 The cluster nodes
192.168.29.97 Parker DML
192.168.29.238 mithril
192.168.29.253 sclarkson
192.168.29.254
192.168.29.231 Sam DML

Other Networking Settings

DNS

The CS dept runs a DNS server at 128.187.80.20 and 128.187.80.21. If you use these, department machines will resolve to their internal (192.168.*.*) address. BYU also runs a DNS server at 10.8.0.19. If you use this one, department machines will resolve to their external address. Either should work, but the latter may be a better choice if you want to see the experience that external visitors will have.

Netmask

This should be 255.255.255.0

Search Domain

Set this to cs.byu.edu if you want to be able to find machines without specifying the ".cs.byu.edu" part of their names.

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