About the Greek School Network

The Greek School Network (www.sch.gr) is the national network of the Ministry of Education and Religious Affairs which safely interconnects 16.207 schools of Primary and Secondary education, including educational units abroad, services and entities supervised by the Ministry of Education and Religious Affairs at central and regional level. The GSN provides services to 1.384.349  students, teaching staff, other educators and other entities of Ministry of Education and Religious Affairs (www.minedu.gov.gr).

Through GSN the Ministry of Education and Religious Affairs provides the educational community with e-learning services, communication, and collaboration, e-government services as well as helpdesk and user support services. A brief description of the main services of GSN is presented in section 5.

GSN is the official and exclusive network and services provider for the units (schools/administrative units) of Public Primary and Secondary Education.

GSN also certifies all members of the school community (schools, administrative units, teachers, students, and administrative staff). The service of safe user authentication is being utilized by the Ministry of Education and Religious Affairs and regulated entities for the provision of specialized electronic services.

GSN Interconnects and supports 16.207 units of which:

The GSN  provides e-learning, communication and collaboration, e-government and user support and assistance services, with personalized access to 1.384.349 users:

Stats date: 2024-06-25 06:29:48


The first efforts to create a national network of schools started by the Ministry of Education in 1996, with actions implemented by the Computer Technology Institute as the “Pilot Schools Network of Achaia” (1996), “Odisseas” (1997), “Winds of Aeolus” (1998) of the action “Odisseia” of CTI.

The Greek School Network was formed as a single national network of schools in 2000. From the beginning of the creation of GSN, CTI undertook the strategic and technical coordination of all involved entities i.e. Universities.

The connection of schools of Secondary Education was completed in January 2011. Subsequently, priority was given to the connection of primary schools and to the assignment of personal accounts to teachers. The network grew rapidly during the period 2000-2006 with co-funded resources. In 2008 the Data Center of GSN was designed by CTI and acquired with resources from OPIS (Operational Program ‘IS’ )which gave a major push to the online services of GSN. During 2006-2009 the upgrade of the connections of more schools to broadband took place. Today broadband index reaches 98.9%. Since 2010 the upgrade of school connections with fibers began and more than 380 schools have now super high speeds which constitute an internationally high index.

The GSN as a public network is working closely and harmoniously with the other two national networks GRNET (www.grnet.gr) and SYZEFXIS (www.syzefxis.gov.gr) and plans the next day (in terms of access) which will be the transition of school’s circuits to the, under construction, Public Sector Network.

Since 2011, and in accordance with article 32 of N3966/2011, the administration and management of GSN is performed by CTI. For this purpose, CTI established the Greek School Network and Networking Technologies Directorate (http://nts.cti.gr), which cooperates with Universities and Technical colleges with specialized networking groups. These entities both support the school/administrative units of their region and some of them develop and support specific web and online services.



Network Equipment

GSN is the largest public network in Greece in the number of users it serves. In particular, it interconnects and also connects on the Internet 16.207  schools, a community of 1.140.978 students and 188.830 teachers. GSN applies modern web technologies and is one of the first five school networks in the world that adopted IPv6 protocol.

GSN owns 118 nodes in all country capitals and in the largest Greek cities. The number of nodes is expected to reach 120 by the integration of the interconnection of GSN with the Metropolitan Optical Fiber Networks of Municipalities. The technical team of CTI that is responsible for the proper functioning of the backbone network manages more than 200 network devices daily. The average network traffic of GSN to the Internet is more than 9 Gbps daily.

Recently, GSN upgraded its network infrastructures of the school complex of Grava (the largest in Greece), using the most modern optical and wireless technologies to serve more than 3.500 users.

Main data center Equipment

The computing infrastructure of GSN is equally stronger. Through this infrastructure, GSN provides its services to more than 1.384.349 members (schools, administrative units, teachers, students, etc.)

The main data center of GSN is located in Athens. Three other (of smaller capacity) data centers are located in Thessaloniki (one) and in Patras (two).

The technical team of CTI that is responsible for the uninterruptible operation of data centers manages daily more than 100 servers and network devices.


Main Services

Broadband Connection

In all public schools and administrative units, a free broadband connection is provided. The connection charges of public education units with GSN and Internet burdens the State Budget. The units abroad do not receive this service. The connection technologies used are VDSL (mainly), optical fibers and selected lines (rarely). Broadband in GSN is 99.9% and analytically:

The main objective of GSN for the next five years is the further upgrade of the medium speed connections, ie. up to 20Mbps for speeds of at least 50Mbps (VDSL technology) and further school connections with optical fibers in order to meet the expanding needs of schools.

Bandwidth Number of Schools (Percentage) Comments
GSN’s Broadband Connectivity Indicators

(April 2021)

< 30 Mbps 3332 (29,5%) ADSL 2-24 Mbps
30 Mbps – 100 Mbps 6830 (60,3%)  VDSL 50Mbps
> 100 Mbps 1.159 (10,2%)  Fiber Optic >100 Mbps



The portal of GSN https://www.sch.gr operates as an informational point for actions related to education and as a central point of access to GSN services. The main features of the portal are:

Visitor statistics: >150.000 unique visitors/month (2022)

Central user authentication service

The Central User Authentication Service (https://sso.sch.gr) provides access to a member of GSN from a single point (Single Sign On) in all integrated applications of GSN and in authorized services of the Ministry and other educational partners without the need for re-accreditation of the user in each one of them.


This is the most popular service of GSN and aims to the handling of users’ emails i.e. schools, teachers, administrative units, administrators and students. Communication is secure and a series of modern features are provided such as viruses and spam protection etc.

Service’s members: 300.344
Daily average number of users: 40.000
Formal unit’s e-mail accounts: 16.061
Other units accounts (e.g. Schools libraries etc.): 1103
Personal Accounts: 261.742


Email Lists

The email listing service is designed for the easy handling of messages and documents to a large number of users. This service is widely used by the Ministry and its regional structures for the handling of formal correspondence at schools.


Web Hosting

The Web hosting service gives schools, administrative units, and teachers the opportunity to create and easily maintain their website.



Internet Safety

For GSN the safe access of students to the Internet and their protection against inappropriate content is a fundamental principle. Since 1999, GSN operates a content control service on the web and applies a secure content policy, in line with international practices and legal requirements.

GSN supports initiatives of Ministry of Culture, Education and Religious Affairs such as informing schools through online meetings from the Computer Crime Unit of the Greek Police. Specifically, GSN provides teleconferencing and live broadcasting services for the implementation of online meetings and until today more than 10.000 schools have actively participated.

Furthermore, GSN (CTI) functions since 2006 the informative hub “Internet Safety” (https://internet-safety.sch.gr) through which reliable and targeted information, support and quality educational material for students and teachers are provided.

Since 2013 GSN (CTI) participates as a national coordinator in eSafety Label action of the European Schoolnet. Through this action, Greek schools can attain a special certification which aims to the support of schools in order to provide a safer online environment for teachers and students. Quantitative indicators of eSafety Label bring our country in the first place in Europe.

A complementary initiative of GSN is the action “Call an expert for Safe Internet” (https://internet-safety.sch.gr/call-an-expert), which offers schools the opportunity to call a certified instructor in safe internet issues to organize an event to inform and educate the school community. The body of experts consists of specially trained and certified teachers and education officials.

Teleconference service

The teleconference service (https://meeting.sch.gr) provides to the certified members of GSN (teachers, schools and administrative units) the ability to create conference calls. The administrator interface is fully localized, supports full audiovisual communication and allows presentation view, file and application sharing amongst participants. This service is in use in September 2014 and has been used in more than 10.000 schools in 36 teleconferences of Electronic Crime.

Users: 65.820(mainly schools)
Total number of teleconferences: 15.592
Total duration of teleconferences: 21.586 hours

E-Learning Service

The e-learning service (http://e-learning.sch.gr) of GSN is based on the world’s leading Learning Management System Moodle. It provides a convenient interface through the internet which promotes participative and collaborative learning. It supports distinct user roles and provides secure and personalized access through its integration with GSN directory service. This service has been certified according to SCORM LMS-RTE STANDAR and it is completed with the teleconferencing and synchronous e-learning system Big Blue Button.

Courses: 1.945
Users: 77.236
Course creators: 1.635
Trainers: 2.475


Electronic Classroom service

The Electronic Classroom service (https://eclass.sch.gr) is addressed to teachers and students of primary and secondary education and enriches the course that takes place daily in the classroom with modern educational ICT tools. The teacher can create online courses and fully interact with his/hers students. This service can also be used for training, collaboration etc. between teachers.

Members: 78.482  teachers and 486.709 pupils
Total until Jun 2022: 144.631 courses


Educational Communities and Blogs

Blogs logoBlogs and social networking are second-generation digital tools (Web 2.0), which are used in the educational process because of their interactive and collaborative offering. The GSN provides the service of Educational communities and blogs (https://blogs.sch.gr) through the open-source platform WordPress. A key feature is that the GSN service provides equivalent functionality to those of public social networks (Facebook, Twitter, etc.) but in a completely secure environment where all members are certified.

Total number of blogs: 83.866
Total users: 117.861
Groups: 1.372
Blogs traffic: >500.000 Unique visitors/month 2022


Electronic schoolpress

The Electronic school press service (https://schoolpress.sch.gr) based on the open-source platform WordPress and addressed to teachers and students of Primary and Secondary education and enriches the classical teaching process with group collaboration tools and with the publication of a group’s activity. Students are encouraged to express themselves, develop and evolve their skills in writing.

Magazines: 4.935
Articles: 47.938

Video services and live broadcasts

The video service (https://video.sch.gr) provides the ability to search, post and play videos with modern tools. It allows users who post material, to enter metadata while offering personalized service to all certified members of GSN. High definition videos are supported by different devices. This service is offered to schools and teachers who can also create their own radio and tv channels and their own groups in which video material is distributed only amongst its members.

Uploaded videos: 4.439
Users that uploaded video: 1.246
Video groups: 110
Video channels: 130

An important feature of the service is the live broadcasting (https://video.sch.gr/live)  which regards to the live broadcasting to the school community as well as online events organized by the Ministry of education, supervised entities or schools. The service is very popular and more than 90 events broadcasted live during the latest three years.

Communication and Cooperation Service

The communication and cooperation service  (https://www.uc.sch.gr) offers schools and teachers with calling options, either with voice or video, telephone conference between multiple users, sending voice messages (voice mail), receiving fax with automatic forwarding to email, instant messaging and marking presence feature. The major benefits of using this service are:

 User Support (Help-Desk)

For the immediate resolution of any technical problem encountered in connection, provided services, and their use. Provided via telephone, email and through a change management system https://www.sch.gr/helpdesk. The user support service is provided by all partners and engineers and technicians are dedicated to it nationwide. User support service carries out a vast number of tickets regarding requests for technical support in school’s ICT infrastructures and requests for GSN services submitted by schools.


Interconnection with European Actions and International Awards

The GSN has received the following international references and distinctions.




minedu logo

Ministry of Education and Religious Affairs, www.minedu.gov.gr

University of Thessaly,  www.uth.gr
3cti Logo

Computer Technology Institute and Press "Diophantus"


University of Ioannina,  www.uoi.gr

National Technical University of Athens, www.ntua.gr
University of Crete,  www.uoc.gr
Aristotle University of Thessaloniki, www.auth.gr
 ihu logo
International Hellenic University

National & Kapodistrian University of Athens,  www.uoa.gr
 uniwa logoUniversity of West Atticahttps://www.uniwa.gr/en/

Internet Service Provider: Greek Research and Technology Network, www.grnet.gr

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