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Network Systems Administrator

Brett Bump, Network Systems Administrator, Blog, Email, HomePage, Phone

The Network Systems Administrator is responsible for the design and operation of the Oglala Lakota College (hereinafter referenced as OLC) Wide Area Network (hereinafter referenced as WAN). The WAN is composed of twelve (12) Intranet Local Area Networks (LANs) and three (3) Internet LANs. The Network Administrator is also responsible for the design and operation of the Internet Network Servers that carry all of the OLC content to and from the Internet. These servers include (but are not limited to), DNS, Email, Firewalls, Academic Content Servers (Currently Moodle), Proxy Caching, and the World Wide Web. The task of creating and managing academic content requires the Network Systems Administrator to work closely with all academic departments.

A Brief History
--------------------
When I inherited the OLC Network 8 years ago, it was a tangled mess of 5 disparate network topologies which could barely talk to the Internet, let alone with each other. If you were to reboot a computer, you had no idea if you were going to get a dhcp address that was on the inside of the network, an Internet address, or if you would have more luck communicating using a string and 2 paper cups. Compounding these problems were the interruptions in electrical services which still sometimes plagues us today. It was obvious that nobody had ever designed a network for the college and I was told the router configurations were setup by someone's friends they knew in Arizona, some years back.

The first thing to do was to design a simple and efficient network topology for the college that would give each college center access to the administrative center as well as firewall access to the Internet. This is accomplished via redundant Internet pipes which can balance the load between the 2 networks, or give all users access to 1 pipe should the other network fail. This was a major concern of mine as the very first month I was consulting for the college, the BIA network was disabled at the federal level and the college was without stable Internet or any email access for over 2 weeks, even though it had another Internet pipe.

The OLC WAN
--------------------
The OLC WAN I designed for the college is the traditional hub and spoke topology that is common in many commercial organizations around the world. I have used this design for over a decade with many commercial organizations in Minnesota, Nevada, New Mexico, North Dakota, South Dakota and Wyoming. For most of those financial organizations I prefer to design the network as a fully meshed frame relay network, as financial WAN networks will typically need the redundancy to communicate with branch offices in case the hub network fails. This is not the case with an educational network and as such, when the hub at Piya Wiconi suffers from an electrical problem, the entire network will suffer as a well.

Routing is accomplished between the intranet LANs via CIDR RIP2, using the 10/8 subnet designation as described in the RFC1918 IETF standard. The decision to run RIP2 over more advanced network protocols was based on the small size of this network, compatibility with Open Source platforms, and the ability for Information Technology students to use simple network analysis techniques to monitor and learn networking protocols:

                  <GWTC DSL>            <Midco CableModem>
                      \                         /
                       \                       /
                  /-------------\       /---------\
      (10.2.4/24)-| Pejuta Haka |--+ +--| He Sapa |-(10.2.5/24)
                  \-------------/  | |  \---------/
                                   | |
                    <GWTC DSL>     | |    <GWTC DSL>
                         \         | |        /
                      /---------\  | |  /--------\
          (10.2.3/24)-| Nursing |  | |  | Oglala |-(10.2.6/24)
                      \---------/  | |  \--------/
                          \        | |        /
                           \       | |       /
             <GWTC DSL>     \      | |      /   <GWTC DSL>
                  \          \     | |     /         /
             /------------\   \    | |    /   /--------------\
 (10.2.2/24)-| Pine Ridge |--- \   | |   / ---| Wounded Knee |-(10.2.7/24)
             \------------/   \ \  | |  / /   \--------------/
                               \ \ | | / /
        /-------------\      /-------------\      /--------------\ /-<KOLC Wireless>
   BIA:-| BIA Network |~~~~~~| Piya Wiconi |~~~~~~| GWTC Network |---<EnterpriseNet>
        \-------------/     /\------+------/      \--------------/ \-<Area51 DSL>
                    <Gym>-{}    / /|||\ \
                               / / ||| \ \         <GWTC DSL>
                              / /  |||  \ \             /
             /------------\  / /   |||   \ \  /-------------\
(10.2.13/24)-| Cheyenne_R |-- /    |||    \ --| Pahin Sinte |-(10.2.8/24)
             \------------/  /     |||     \  \-------------/
                            /      |||      \
           <GWTC Wireless> /       |||       \ <GWTC DSL>
                     {}   /        |||        \    /
                /---------------\  |||  /------------\
   (10.2.12/24)-| East Wakpamni |  |||  | Eagle Nest |-(10.2.9/24)
                \---------------/  |||  \------------/
                                   |||
                   <GWTC DSL>      |||    <GWTC DSL>
                         \         |||         /
                   /------------\  |||  /---------\
      (10.2.11/24)-| Pass Creek |--/|\--| LaCreek |-(10.2.10/24)
                   \------------/   |   \---------/
                                    |
                                (10.1/16)

                              /------------\
              (10.100.1.0/24)-|Skyline Colo|
                              \------------/

BIA  Network Pool: 169.203.118/24
GWTC Network HSpr: 64.251.167.224/29
GWTC Network SkyL: 64.251.167.160/27

Decentralized DSL Addresses

Piya Wiconi:       64.251.181.178
PW Admin:          64.251.167.177
Pine Ridge:        64.251.168.37
Nursing:           64.251.168.36
Pejuta Haka:       64.251.191.198
He Sapa:           24.111.189.130
White Clay:        64.251.168.39
Wounded Knee:      64.251.168.38
Pahin Sinte:       64.251.168.255
Eagle Nest:        64.251.168.77
LaCreek:           64.251.168.76
Pass Creek:        64.251.168.79
East Wakpamni: (N/A)
Cheyenne River: (N/A)

Multipurpose Gym:  68.69.81.228
Area 51:           68.69.73.136
Automotive:        69.77.242.242
                                

OLC Email
--------------------
The OLC email server is a sendmail based system that uses procmail recipes for email filtering, as well as clamav for virus and phishing detection. The system supports roughly 5000 user accounts consisting of about 200 full time staff, 150 adjunct staff, 4500 students and 150 employees that work for the headstart program under OLC management. There are currently two (2) Open Source email webclient software packages installed that users can access from the web, as well as imap and pop3 for email client applications:

The mail server also supports an individual blogging system for every email account on the server. The Open Source php blogging system that is installed is pppBLOG. Further information about the OLC email system can be derived by reading the email FAQ, located on the Technical Support Services web page.

OLC World Wide Web
--------------------
The OLC web server is an apache based system utilizing PHP for web development. The system supports roughly 50 web designer accounts, that create all of the content contained on this server. The goal for all OLC web designers is to create and maintain web pages that follow W3C compliance when ever possible. Further information about the OLC web system can be derived by reading the web FAQ, located on the Technical Support Services web page.

Tss WebLinks...

  1. ARSC Chat Server (Deprecated)
  2. EMail Lists
  3. EMail Mini-FAQ (In New Development)
  4. EMail Password Change
  5. EMail Reject Stats (Deprecated)
  6. EMail Server at OLC
  7. Ftp Weeble Web Client
  8. PicTel Schedule
  9. SysInfo Server Stats
  10. Watchdog (Via Local Network Only)
  11. Webalizer Usage Stats (Deprecated)
  12. Web Navigator (Deprecated)
  13. Web Server FAQ (Deprecated)
  14. Weeble FTP Client
  15. Technology Plan 2012

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