XS Community Edition/0.3/Project Specifications

School Server - Community Edition 0.3 Project Specifications

Summary

The school server is very similar in concept to a standard home wireless router. In everyday usage it provides various services which extend capabilities of the connected laptops while being totally transparent to the user. These services can include:

• Network connection – various services similar to what you would find in a home router.
• Presence server – Augments sugar's native collaboration functionality.
• NEW IN 0.3 - Web filtering – Enables schools to comply with local/legal restrictions on internet access for children.

Reference User

The XS-CE has two different types of reference user:

• Skilled sysadmins running micro-deployments
• Mid-sized deployment with limited onsite sysadmins

Hardware

School servers can be either an XO or standard x86 based hardware.

XO

XSCE v0.3 will run on all 4 XO laptops:

• XO 1
• XO 1.5
• XO 1.75
• XO 4

In common usage, the XO may be augmented by SD cards and two off the shelf USB devices:

• Network connector – Allow the server to offer internet access to connected XO's.
• NEW IN 0.3 -- 2 USB internet dongles.
• NEW IN 0.3 -- External USB hard drive – Allows the server to provide additional storage capabilities.

X86

For greater flexibility some schools will want to use standard x86 hardware. Diligent volunteers can help make x86 and x86-64bit support increasingly real.

Deliverable

RPM

A RPM combined with tested installation instructions necessary to convert a standard XO-1.75 or Fedora-compatible x86 computer into a School Server.

IMAGE

NEW IN 0.3 -- An downloadable USB flash drive image, combined with tested installation instructions, which permit deployment staff to install XSCE software without an internet connection.

Base OS

NEW IN 0.3 -- OLPC-OS 13.1.0

Modular design

One of the key design criteria of successful community-based projects is modularity.

NEW IN 0.3 -- 'plug in services'

Core Server

The core server will contain five services which can be extended via extended services.

Service: Network setup
Purpose:
Provider: xs-setup-network

Service: Dynamic Host Configuration Protocol
Purpose: Schoolserver and clients need to be on same subnet.
Provider: dhcpd

Service: Iptables -- Network Address Translation (NAT)
Purpose: Permits all XO’s to access the internet.
Provider: gateway

Service: Internet domain name server
Prupose:
Provider: named

Service: Backup of student work and restore
Purpose:
Provider: idmgr

Service:Jabber server
Purpose: collaboration > 15 clients needs to work.
Provider: ejabberd

Extended Services

Service: Web server
Purpose: Building block for many other extended services
Provider: apache

Service: proxy server and web cache
Purpose: bandwidth, web-filtering, web-monitoring
Provider: squid

Service: OLPC-update
Purpose: OLPC-update is necessary to update the kernel of XO
Provider: rsync

Service: Activity update
Purpose: Enables teachers to easily distribute new or updated activities to their students
Provider: activity updater

Service: Virtual Private Network (VPN)
Purpose: Creating secure point-to-point or site-to-site connections in routed or bridged configurations and remote access facilities
Provider: openvpn

NEW IN 0.3 -- Service: Content filtering (TimM??)
Purpose: age-appropriate surfing, legal compliance, religious risks
Provider: dansguardian and opendns

NEW IN 0.3 -- Service: 1-N WebDEV(JerryV, GeorgeH)
Purpose: Journal submissions to teacher, academic record (homework etc)
Provider: WebDAV

NEW IN 0.3 -- Service: Statistics Collection
Purpose: Collects users statics for academic research
Provider: pilot monitoring system

NEW IN 0.3 -- Service: Book server (SameerV, AlexK, GeorgeH struggling!)
Purpose: compete with Khan Academy?
Provider: pathagar

NEW IN 0.3 -- Service: Internet in Box
Purpose: Provide offline content
Provider: ???