Geographic condition of Indonesia which consists of 17,000 islands large and small cause spread of education, both access and quality education becomes impossible. So that the quality gap and spread mostly accumulated on the island of Java and in areas close to large cities. This can not continue to let this happen, because education is a must to be enjoyed by the entire nation.
Many people say, that one solution is to utilize information and communication technologies, or commonly abbreviated to ICT.
However, the geographical conditions become the main obstacle. Very difficult to hold the cable network to all parts of Indonesia, because of its geographical contours are fairly typical.The only technology that can reach every region is using satellite technology. But, this is still not maximized so that operational costs remain high.
The technology which is currently being explored by Depdiknas ( Departemen Pendidikan Nasional / National Ministry of Education), especially by Southeast Asian Ministers of Education Organization Regional Open Distance Learning Centre (SEAMOLEC) is a multicast technology, which uses a satellite dish devices for downstream to upstream and terrestrial. This technology is very suitable to the geographical conditions in Indonesia, which is mountainous and is still equally difficult to reach with wired connections.
SEAMOLEC (Southeast Asian Ministers of Education Organization Regional Open Learning Centre) which has the main task to develop open and distance learning in the Southeast Asian region. To be able to successfully carry out their duties, SEAMOLEC do not think only country that is technologically advanced and regions that were reached by the ICT, but must pay attention to all the countries in Southeast Asia that has not reached advanced technology and who lack adequate facilities.
Understanding of SEA EduNet
SEA EduNet name was taken because this program have a hope for the sharing of educational materials among Southeast Asian countries. This aims to ensure that the quality of education in Indonesia is not going to lose to other Southeast Asian countries, also because of SEAMOLEC scope of work includes also other countries in Southeast Asia.
SEA EduNet is a data transmission system using satellite and multicast method which is used for distance learning. SEA EduNet can be also referred as E – Learning (electronic learning), namely an electronic learning system, using electronic media. Among them: internet, tv, multimedia files such as voice, images, animation and video. SEA EduNet with all the information needed by the community learning in the corners – all regions can be easily obtained without having to online.
SEA EduNet Multicast concept (simultaneous delivery to multiple points by one-way communication), so as much as any number of clients with high-speed data transmission can be done. Different with the Internet, using the Unicast method (a method of data transmission where data is transmitted at one location clear, and every location that receives and then sends the report to the sender’s receipt), in this method more and more clients from a connection point, then the speed of their each client will be equal to the speed of the source (server) divided by the number of clients, in other words more and more clients then the velocity decreased. It will greatly disturb in the delivery of large amounts of data in large quantities to many points.
Here is an explanation of the data transmission method includes:
In the computer network system, method of sending data packets are generally divided into 4, namely anycast, Unicast, Broadcast and Multicast.
Anycast is a data transmission method where data is transmitted at the nearest location or on line (connection), best seen by the system. The analogy is, in a campaign, one candidate wants to send a brochure of his party. This brochure was later awarded to anyone who was nearby or accidental passing in front of him. Every single time, only 1 brochure provided.
Unicast is a data transmission method where data is transmitted at one clear location, and every location that receives and then send the report of receipt to the sender. Quality guaranteed data delivery, for each delivery failure will be known by the sender and can perform retransmission. These systems are commonly used in current computer network system. The analogy that can be used according to the above case is, the party brochure sent using recorded delivery service to the 1 clear address. If the packet is received, then the proof of acceptance will be given to the sender, whereas if the package does not arrive, then also reported to the sender.
Broadcast is a method of data transmission, where data is transmitted to many points at once, without checking whether the point has been made ready or not, or regardless of whether the data is up or not. One example use of this system is a broadcast television and radio. Where the broadcast station that broadcast continuously without regard to whether there was a television set or monitor radio broadcast. The analogy that can be used is, the party brochures were distributed to anyone passing by on a road, regardless of who the recipients. Is it a party or even other party members.
Multicast concept is similar to the broadcast, where data is sent to many points at once, but the difference is, the destination point is classified based on group-specific group through the group intended address. This will result in delivery to be more effective than broadcast but can receive far more than the unicast system. Analogy is, the party sent a brochure on a large scale to a particular address which is the target of a direct party to address them.
Picture 1 : Graph Comparison Unicast with Multicast
SEA EduNet System use the Multicast concept, where the data transmission system is carried out simultaneously to many points (one to many) but remain grouped into specific groups. This will result in bandwidth efficiency, where with a small bandwidth can be utilized to the many points at once.
A concrete example in the system is running now is, if the bandwidth of this item on the main points of 1 Mbps and there are 100 points that are connected with this system, then every point will gain bandwidth 1 Mbps: 100 = 10 Kbps. Meanwhile, the tangible results when the bandwidth of the SEA for 1 Mbps and is divided into 100 points, then every point of which there are still gets Bandwidth 1 Mbps respectively. So size is not reduced bandwidth. This is where the advantages of multicast.
The weakness lies in the guaranteed delivery of multicast data. Since there is no check whether or not the data sent, then the risk of not receiving the data will be large. For example a data sent from the center to the regions, but in the area did not turn on the device, or device is susceptible to interference, so that data will never arrive at the destination point. This is where the importance of data backup at center, or miror data, so if desired retransmission of local demand, it can be done immediately.
Picture 2 : SEA EduNet scheme
With all the technologies above, then SEA EduNet can be more flexible. If in one area completely inaccessible by terrestrial networks, we can use multicast system, so it can continue to receive the data, although only one direction. However, if in the area are already available terrestrial network, either through Inherent (network that connects all universities in Indonesia), Jardiknas (a network that connect inter-district or city) or ISP (Internet Service Provider) for example: Speedy, Fast Net, IM2, etc.. UDLR protocol (sending data through the cable network (terrestrial) from the location, so that communication systems that are not made in one direction again, but in two directions) can be utilized effectively.
To run this SEA EduNet system SEAMOLEC in cooperation with PT. Telkom, by using Telkom 1 satellite which is in the scope SEAMOLEC, in the entire of Southeast Asia region. All of the data transfer is done directly from SEAMOLEC through the station Bumi Cibinong then will be accepted by all the destination point.
Picture 3 : Satellite Telkom 1
Picture 4 : Bumi Cibinong Station
On the client side or the receiver, the device required is not too difficult, because it uses the device frequently used by the public. These tools are:
● 1 Parabolic Antenna Unit (Solid type recommended minimum size 8 feet)
● 1 Set LNB (can use a single course)
● 1 Unit PC used as a web server and router (highly recommended has a storage medium / large HDD, because it became the storage center data
● 1 Unit Modem Satellite (DVB-S)
Picture 5 : Parabolic antenna and LNB which is used
Picture 6 : SEA EduNet scheme at the receiver side
Benefits of SEA EduNet
In general, there are 4 benefits of SEA EduNet, those are :
1.3.1 Video Broadcasting
Is a video that is passed through the IP. Emitted to the public through the satellite, cable, and radio through IP or analog format.
It must be admitted that the quality of teachers and lecturers in Indonesia is very diverse. Start from the best to less good, and it spread all over Indonesia. To obtain the best results, then the required learning provided by the best people in the field. Unfortunately such people is very small. Now, with SEA EduNet, the teachers and the best lecturers are then recorded as giving a lesson in class and then displayed through this system.
By a regular schedule, this impression can be given in class and discussed with the teacher and students. Because using Multicast and IP-based systems, the impressions can be enjoyed directly on the computer in whole class or in the laboratory.
Picture 7 : Using SEA EduNet in class scheme
1.3.2 Vicon Broadcasting
Currently the implementation of video conference has become a common thing done. One example is the discussion of the Commission by the Supreme Court dispute with a variety of areas. Well, how about a video conference can be viewed and enjoyed also by the other points throughout Indonesia? Mainly in universities that have law schools or secondary schools who want to learn the Indonesian justice system but has no internet connection at all?
With SEA EduNet, the implementation of video conference can be broadcasted directly through a satellite system so that all points can receive broadcasts that occurred at that time also. Indeed the limitations of this system, because it uses multicast system, it can not be done in two direction of communication. However, it is very adequate to meet scientific aspects to this activity. Another benefit of this system is able to spread the seminars, both nationally and internationally, both online and directly on the spot, so information and knowledge can also be disseminated more widely.
1.3.3 Data Broadcasting / FTP Mirrors
It is a fact that is connected with the words, symbols, objects, situations or condition and the information presented in digital form by signals sent to various locations either through satellite, radio (audio), TV (audio visual) and data communications on the network.
There is now a lot of content-based learning content-based e-book and multimedia, one example is the Electronic School Books (BSE). However, to disseminate these materials are still faced with several obstacles, one obstacle to the delivery of the intended location. If using a CD or flashdisk, it will be hampered by limitations of storage media, not to mention if there was a change of data or data updates. When using an internet connection, it will be limited by the amount of bandwidth required to send all the data.
With SEA EduNet system, then all data, both video learning, multimedia materials, as well as e-books can be sent directly to the destination point without having to connect to the Internet. Shipping executed directly from the SEAMOLEC through NOC in Bumi Cibinong Station and will be accepted by the entire point. Then, the whole point of satellite modems can connect the device Multicast respectively to File / Web Server that can be accessed through the local network.
Picture 9 : Diagram of File Delivery in SEA EduNet
1.3.4 Satellite TV Broadcasting
This is what distinguishes this system compared to other devices. With
combining data with broadcast TV, so this system can also be a learning tool as well as entertainment. Simply by subscribing to satellite TV service provider, then the device can also receive TV broadcasts according to the services offered.
However, specifically for SEA EduNet, we have prepared a package special education, which in addition to the concept of video and data delivery supplied to the customer, television broadcast is also limited only to broadcast television supporting learning, such as National Geographic, Discovery Channel, Animal Planet, TV Education, and other broadcasts. So that can help reduce concerns of parents towards their children’s spectacle at home.
With this function, then SEA EduNet can not only be mounted at an educational institution, but also can be installed in people’s homes.
Picture 10 : Connection to TV using SEA EduNet
SEA EduNet Parabolic Pointing
2.1 Equipment and materials
Tools and materials used to make Pointing parabolaics, which are:
2.1.1 Materials used
Parabolic Antenna size is recommended:
6 Feet Solid type
9 Feet or larger type Mesh
LNBF (Low Noise Block Fedhorn) or frequently called LNB, the used LNB is C-BAND LNB
Using the type of U or RG 6 coaxial cable high quality (at least the TV antenna cable)
BNC 2 units
2.1.2 Equipment needed
Compass (optional if you already have a GPS with a magnetic compass)
Tools Key Set
2.2 Assembling parabola
Prepare dishes that will be assembled
Set up parabolic dish with a separate disc clamp parts with bolts and toolkit that has been prepared.
Set up mountingbar then crown to the parabolic dish.
Then crown the parabolic dish that is mounted to the frame buffer mountingbar direction
Then connect the frame buffer mountingbar direction has been attached to the leg / pole parabola.
When finished and already fully formed, ready to dish on the set / in pointing.
2.3 Steps to do Pointing Parabola
Prepare the completeness of the material – the necessary ingredients such as: modems digibox, television, computer servers, cable modems UTP, Coax cable from the modem. Then tools – tools such as: Angle meter, compass, toolkit.
Connect the UTP cable to the modem / Coax Cable digibox and satellite dish to the LNB.
Make sure the position of parabola perpendicular to the ground.
Then point the LNB 0o to the west.
Make sure the dish is facing north, with east longitude 180o angle.
Angle Measurement using meters. Attach Angle meter in the frame buffer parabolas, with the provisions of the needle should be right on the corner in 180o.
Then arrange the slope of the parabolic dish with a way of directing the disc in the right direction, and then specify the angle of elevation (vertical tilt) and azimuth (horizontal slope).Examples: for areas of Ambon, on Angle meter, the needle will show the elevation angle = 65.90, and Azimuth = -79.47
If the elevation and azimuth angle was appropriate, and then observe a computer monitor / television, which has been linked with a digibox. Then look at the monitor SQF, SQF must show a minimum rate of 80% and a maximum of 100% to get the visual / image that is not broken – broken. Then the BER must indicate the number 0 so that the resulting picture smooth and does not vibrate.
If you’ve got a clear picture, then the next step is to connect to the server via digiserver parabola.
3.1 Understanding of DigiBox
DigiBox is a set up to box modem receiver box that allows you to receive data from multicast system SEAEduNet.
3.2 Advantages Of DigiBox:
Support LAN (Local Area Network)
Supports an additional hard disk
Encryption frequency with irdeto cards.
GNU / Linux OS
3.3 DigiBox Configuration
Basically DigiBox has been made as automatic as possible. So DigiBox is user friendly (no need to configure).
Can be operated through a web based.
3.4 DigiBox QC (Quality Control)
Basically DigiBox has been tested and meet the QC. The device is in DigiBox cardboard are:
Remote (include battery)
3.5 DigiBox Multicast Software
Smcroute, named as multicast routing is useful to forward data packets from the LNB in DigiBox to DigiBox Ethernet that connects to Multicast Server.
In Detail Smcroute can be configured:
Smcroute can be reconfigured, if we have information from the center.
If you get the latest information for smcroute, it can edit the location of the file:
[root@digibox~]# vi /etc/init.d/dvbnet
3.6 Data Received DigiBox
Data received by DigiBox be in the form of Video, Audio, and Data.
Admission and data transmission using UDP protocol.
Data transmitted and stored into the Server Multicast.
Default configuration on DigiBox:
By default, DigiBox have the following configuration :
IP Address : 192.168.1.254
User : root
Password : secret1234
Access: Telnet, Web, FTP
Access to DigiBox:
By default users can access the DigiBox, through:
[Root @ digiserver ~] # telnet 192.168.1.254
Connected to 192.168.1.254
SEA EduNet receiver scheme
Introduction of DigiServer
Definition of DigiServer
DigiServer is an operating system created as a medium of data storage of the SEA EduNet Multicast system Diremaster of Centos 5.3 (Linux)
4.2 Specification / Digiserver computer needs:
Hard drive, at least 80 GB
Ethernet, at least have 2 pieces (brand: d-link, Realtek) the most important thing is to be unreadable by the operating system GNU / Linux.
Minimum 1 GB Memory
Prepare appropriate levels DigiServer Installer CD. For example, if users want to install Server for junior high school, then the school can use the Installer CD DigiServer SMP, and vice versa.
Installer CD can be downloaded in DigiServer http://repo.seamolec.org/
Make sure you install hard disk is empty. If your hard disk will still have the operating system installed, the user can use the help of the Windows CD to delete the partition first, or may use other assistance in order to partition the hard disk that will be installed into an empty (no partitions at all).
4.3 DigiServer Installation
Here is a step by step to install DigiServer:
Please note to install DigiServer, because DigiServer installation using kickstart, then the user is expected to adjust in accordance with their respective hard disks.
If the user’s hard disk using ATA (IDE) then can use the Installation CD had category (usually used PD linux).
If users are using SATA hard disks (SCSI) then can use the Installation CD sda category.
|No||Kategori Jenjang||DigiServer HDA||DigiServer SDA|
Setting boot computer that will be installed into the CD ROOM, due to the installation would use a boot with the CD Drive.
Insert the Installation CD into your CD Drive DigiServer Computer. When the CD DigiServer been entered, then the server will boot. Then look like the picture below, press ENTER, then the main system, will install automatically.
Picture 1 : DigiServer Booting
Wait until the installation process is complete, see the following figure.
Picture 2 : DigiServer Installation process
DigiServer After the installation process is complete, and would appear like the following picture, then press Enter to restart the computer user.
Picture 3 : Digiserver Installation Finish
Use of DigiServer After Installation
4.4.1Connecting with DigiBox DigiServer.
To connect DigiServer and DigiBox, users can use the cable crossover cable. But if the Ethernet on the Server (computer) that already have auto-installed Ethernet, it can use a straight cable.
Connect devices with DigiServer Digibox like the picture below.
Picture 4 : Connect DigiServer with Digiox
Eth0 is on the picture is Ethernet0 on DigiServer and while eth1 is Ethernet1.
Make sure all the Ethernet Connected like the picture.
Once connected in a network according to the picture, the user can turn on computer (server) is already installed DigiServer.
At the turn DigiServer will appear as the following process.
After booting process is completed it will look like the following picture.
If you look like the picture above, users need not worry. Because the process is not a process of error on the server but the process used to receive data. Because DigiServer seotomatis made possible so that users do not need to turn on a service-the service.
After that will appear like the following picture.
Users do not need khawatis with the emergence process on the Server (DigiServer) users.The process is not an error of DigiServer, but the process is the process of multicast routing.Where the routing function to forward packets from the server to the client-client terkonek with DigiServer.
If Starting multicast routing… process repeatedly going on (sustainable) when lit Server (DigiServer). That’s because there’s Ethernet DigiServer not yet connected to the DigiBox, or to the Client Computer (the network). So from that computer is connected to DigiServer DigiBox should be connected to a local network and client or user.
Then log into tty1 (terminal 1) on the Server (DigiServer) by pressing Ctrl + Alt + F2 on the keyboard user. After performing the login screen, type the root user and password secret.Because the default user and password already configured DigiServer.
Then switch to the configuration database and moodle SEAEduNet by typing: ./startmoodle
[Root @ digiserver ~] #. /startmoodle
Description: type. (Points) and / (slash mark) and startmoodle.
Process Configuration lit startmoodle done only 1 time after the installation process DigiServer. If you’ve already turned startmoodle process, it is expected that the user did not switch back.
4.3.2 Check the Connection Between DigiServer and DigiBox
Once users connect DigiServer and DigiBox later with the client computer. Make sure that DigiServer can be connected to the device and Computer DigiBox client.
Log into the Digiserver by typing user root and password rahasia.
Type in ifconfig eth0 and ifconfig eth1 on tty1 (terminal1) like this:
Ifconfig was to see that there is an IP Address on Servers that use Linux operating system.
Ifconfig eth0 is to see the IP Address of Ethernet 0 on the Server (DigiServer).
Make sure that the IP Address of eth0 (Ethernet 0) is 192.168.1.1
Ifconfig eth1 is to see the IP Address Ethernet 0 on the Server (DigiServer).
Make sure that the IP Address on eth1 (Ethernet 1) is 10.17.1.1
By default the system DigiServer’ve configured IP address on eth0 192.168.1.1 while on eth1 10.17.1.1.
Ping to DigiBox device to see the connection between DigiServer with DigiBox.
Type in ping 192.168.1.254 on the terminal server (DigiServer). See the following figure.
When the results from pinging like drawing, so users can already connect with DigiBox, and vice versa if the results from the ping there is no reply from DigiBox, then the Server (DigiServer) of the user has not connected with DigiBox device.
Setting IP address using dhcp in client computer. Because the main system DigiServer already configured with DHCP Server and DNS Server.
IP ping 10.17.1.1 from a client computer user. If the result of the ping reply, then the user is connected to the Server DigiServer. And vice versa if the result does not reply, the user is not connected to Server DigiServer.
4.3.3 Data Acceptance Check Script
After the user has to make sure Server (DigiServer), DigiBox, and Client Computers are connected, the user can perform a check script for receiving data.
Log into Digiserver by typing user root and password rahasia.
Type the ps – ax | grep terima on tty1 (terminal1) like the picture below.
Ps – ax is a command line to see the processes currently running.
To receive data depend on each category. If at the time of installation the user is using Junior High School category, then that will appear is a terima-data-sd, terima-data-moodle, terima-data-visible, and vice versa.
System for receiving data is done automatically. So that users do not need to do configuration or switch service on Server (DigiServer).
Shipping data is done by the center (SEAMOLEC).
Server (DigiServer) is responsible for receiving data sent through the network of SEA EduNet.
Acceptance of SEA EduNet Data with DigiServer
5.1 Viewing the data already entered in the Server (DigiServer)
To view the data is already entered into Servers (DigiServer), users can access through client computer connected to the Server (DigiServer).
Make sure the client computer is connected to the Server (DigiServer).
Use ping to check the connection between client and server computer (DigiServer). Ping 10.17.1.1
If the results of the ping reply then the user can access http://digiserver.seaedunet.local from a client computer that connects to DigiServer. See the following figure:
Click on the folder data, then select the data that users want.
Folder visible is the place to receive data from SIAP visible(http://visibel.siap-online.com)
Backupmoodle folder is a place for receiving data from the eLearning SEAEduNet (http://elearning.seamolec.org)
DigiServer Management with Webmin
Login to DigiServer Webmin
To Login to DigiServer Webmin, user can access through client computer which has been connected with DigiServer.
Type this address to user browser.
Then will shown this picture.
Type Username root and Password rahasia, because DigiServer has automatically configured as using that user and password
Then click Login
If user has been able to access into Webmin DigiServer, then will be shown this picture:
5.2.2 Changing the Password Login webmin DigiServer
After the user successfully logged into webmin DigiServer, users are also able to change passwords that have been configured.
Select Menu Webmin, Webmin Users then select the menu, then click the root. See the following figure:
After the user clicks on the root, it will look like the following picture:
d. Change Password positions from Don’t chane to Set to
e. Then type the password that the user wants to enter.
f. Then click save.
g. When you’re finished, the user can logout from the system by clicking Logout webmin on the menu. See the following figure:
After click Logout, log back in using user “root” and password “password that the user has to change.” Then the user can enter into the webmin system with the new password.
5.2.3 Changing the DigiServer DHCP Range
a. To change the DHCP server on digiserver users can use webmin.
b. Login to webmin, then select the menu Server
DNSMasq integrated DNS & DHCP servers.
c. Then select Configure DHCP menu at the bottom. See the following figure:
Then select the DHCP IP Address Ranges, and click on the default IP address is 10.17.1.1. See the Following figures:
After click 10.17.1.10 it will look like the following picture:
• From an IP Address IP address is the first time dibroadcast DHCP server to the network user.
• To IP address is the last thing dibroadcast IP Address by DHCP Server to network users.
Fill in the form Edit the DHCP range with the following provisions:
• From IP address: Fill in according to user needs
• To IP address: Fill in accordance with the form in Form IP address
• To form the others, just ignore and do not need to be changed back.
Example we want to change the IP address range from 10.17.1.50 to 10.17.1.70. Then insert into the form:
• From IP address: 10.17.1.50
• To IP address: 10.17.1.70
h. Then click Save to save the configuration.
i. Then check on the DHCP IP address range, whether lan01 that had changed was updated by the webmaster. See the following figure:
j. If the IP address of the lan01 From’ve become To the IP address 10.17.1.50 and 10.17.1.70 is already a DHCP ip address range in user DigiServer was irreplaceable.
k. Dnsmasq restart the service by selecting the System menu -> Booting and Shutdown in webmin menu. Then click dnsmasq. See the following figure:
l. Then the image will appear as follows:
m. Click on Restart Now to restart the DHCP server on the user DigiServer.
n. Then it will appear as follows:
Executing / etc / rc.d / init.d / dnsmasq restart ..
Shutting down dnsmasq: [OK]
Starting dnsmasq: [OK]
o. If at the time of starting dnsmasq OK then configure the DHCP Server on DigiServer user has been successful. But if the result is FAILED, then there are errors in the configuration of DHCP server on the user DigiServer.
Moodle E-Learning SEA EduNet
Login to Moodle DigiServer
a. To log into Moodle DigiServer, users can access using a client computer that is connected with DigiServer.
b. Type the following address on the user’s browser. http://moodle.digiserver.seaedunet.local
c. Then the image will appear as follows:
d. Click Login at the top right, to enter the Moodle administrator at DigiServer pages.
e. After click Login it will look like the following picture.
f. Type the user admin and password rahasia. In the main system, DigiServer already configured to use user and password.
g. After the user successfully logged into Moodle DigiServer, it will appear like this:
6.2 Changing the user password on the moodle admin
a. After the user successfully logged into Moodle DigiServer, users are also able to change passwords that have been configured.
b. Click on the User Admin User, at the top right of moodle. See the following figure:
c. If the user has clicked Admin user, then the image will appear as follows:
d. Click Change Password to change the default password to a password that the user wants.
e. If the user has clicked Change the password, it will look like the following picture:
f. Fill in each field with the following conditions:
• Current Password is your old password or a password at this time (rahasia).
• New Password is the new password that will replace your old password and the default password.
• New Password (again) is the password must be entered into a new form with a password that same password.
Then click Save changes. Then it will look like the following picture:
Click Continue to proceed. When it is done, it shows that the password for access to the moodle DigiServer been replaced with passoword that have changed. Then the user can try to logout from moodle, and access moodle SEAEduNet back with the user password has been changed by the user.
Management DigiServer and DigiBox.
7.1 Conditions Prior to Change IP Address and DigiBox DigiServer
a. Before the user change the IP Address in DigiServer and DigiBox, the following provisions if the IP Address in DigiServer and DigiBox be changed.
b. If the IP Ethernet eth0 changed but remains as an Ethernet connected to the DigiBox, so users do not need to change the script receiving the data. But if users change the conditions DigiBox Ethernet is not connected to eth0, then the user must adapt the script from the data receiver in accordance with Ethernet SEAEduNet system that is used to connect to the DigiBox. The location of the following files located in the directory / root/terima-data- [existing script].
c. If the user change the IP Address in DigiBox then the user must also change the static ip-RPS on the configuration in accordance with the ip address xorp on DigiBox. The location of the following files are in directory /etc/xorp/myconfig.boot
d. For example, Ethernet is used to connect to DigiBox is eth0, and which is connected to the client (user network) is Eth2. If users change the Ethernet interfaces on DigiServer, in terms of interface used is other than eth0 and eth1. And users also have to adjust the configuration on xorp. The location of the following files are in directory /etc/xorp/myconfig.boot
e. If users change the default IP address 10.17.1.1 to xxxx (accordance with the user). So that must be adjusted by the user are:
• Configuration DigiServer hosts. Location of the following files located in the directory / etc / hosts
• Configuring dnsmasq. Location of the following files located in the directory / etc / dnsmasq.conf
7.2 IP Address DigiServer
a. To change the IP Address DigiServer users can perform using the CLI (Command Line Interface).
b. If users want to change the IP Address in the DigiServer eth0, then can use the following command:
[Root @ digiserver ~] # vim / etc/sysconfig/network-scripts/ifcfg-eth0
c. Then it will appear as follows:
d. That need to be modified by users are the following lines:
• IPADDR: 10.252.10.1
o IP ADDR is the IP address that will be used by the Server DigiServer users.
• netmask = 255.255.255.0
o netmask is the netmask that will be used by the server user DigiServer
e. For example, a user will change the IP Address to 10.252.10.1 and Netmask to 255.255.255.0.
f. Type “i” or insert on the keyboard user. Then it will look like the following picture:
g. Then edit the IP ADDR and netmask in accordance with user needs.
h. After that, press ESC and then type: WQ (WQ colon)
i. If you already saved restart DigiServer network by logging into webmin.
j. Then select the menu System -> bootup and Shutdown, then select the network and then Select menu Start Now.
7.3 DNS Server
a. To change the DNS Server on DigiServer, the user can change using webmin.
b. Login to webmin users
c. Select Servers dnsmasq DNS & DHCP Servers integrated. See the following figure:
d. Then the display will appear as follows:
e. Click the Add new domain forced to create a new domain which is adjusted by each user.
f. After that will appear like the following view:
Click on the new section to change the user create a new domain. Then it will appear like this:
Change Domain name in accordance with user needs. Example user wants to modify the domain name to smk.local. Then fill in the form in accordance with the following provisions.
• Domain name: a new domain name that will be created by users.
• To IP address: IP Address that will be used for domain names. Example: 10.17.1.1, which are connected by a network of users.
• In use: select Yes if the domain is to be used by the user.
i. Then click Save, to save the configuration.
j. Dnsmasq restart the service by selecting the System menu -> Booting and Shutdown in webmin menu. Then click dnsmasq. See the following figure:
k. Then it would look like the following picture.
l. Click on Restart Now to restart the DNS server on the user DigiServer.
m. Then it will appear as follows:
Executing / etc / rc.d / init.d / dnsmasq restart ..
Shutting down dnsmasq: [OK]
Starting dnsmasq: [OK]
n. If at the time of starting dnsmasq OK then configure DNS server on the user DigiServer been successful. But if the result is FAILED, there are configuration errors on DNS Server on DigiServer users.
7.4 UDP Cast as the reception of data.
a. If users change the configuration of Ethernet interfaces on DigiServer, then the user must change the configuration of udp-cast (script data receiver).
b. For example, users change the configuration interface is connected to an Ethernet DigiBox 2 (eth2). It is necessary to change the script configuration data receiver.
c. Script data receiver is in the directory / root /
d. To see if the script contained in the root directory can take these steps.
e. Make sure the user is in the directory / root /. To see the condition of the user directory can use the following command.
[root @ digiserver ~] # pwd
If the result shown is / root, then the user is located in the directory / root /
f. But if the results appear instead of / root, the user must enter into the root directory using the following command.
[root @ digiserver ~] # cd
[root @ digiserver ~] # pwd
pwd is a command line to see the condition of the user in the directory where.
g. Then see whether there is a script on the Server DigiServer recipients. To see the script can use the following command.
[root @ digiserver ~] # ls-al | grep thank
-rwxr-xr-x 1 root root 888 Nov 7 09:52 terima-data-politeknik
-rwxr-xr-x 1 root root 863 Nov 7 09:52 terima-data-sd
-rwxr-xr-x 1 root root 866 Nov 7 09:52 terima-data-sma
-rwxr-xr-x 1 root root 866 Nov 7 09:52 terima-data-smk
-rwxr-xr-x 1 root root 866 Nov 7 09:52 terima-data-smp
-rwxr-xr-x 1 root root 870 Nov 7 09:52 terima-data-umum
-rwxr-xr-x 1 root root 891 Nov 7 09:52 terima-data-universitas
-rwxr-xr-x 1 root root 891 Nov 7 09:52terima-visibel
-rwxr-xr-x 1 root root 912 Nov 7 09:52 thank-visible
h. Edit all the scripts that have received the directory / root. For example, we’ll edit the script terima-data-sma
i. Use the following command line, to edit the script received-data-sma
[root @ digiserver ~] # vim received-data-sma
then will be shown the following picture :
k. To edit the button i can use or insert on the keyboard user. Just like the user to configure the IP Address.
l. Change in the following section.
• ethernet = “eth0″ to be
• ethernet = “eth2″
• It is expected that users not change the other part, other than the ethernet. Because the configuration script has been adapted by receiving SEAEduNet Center (SEAMOLEC).
m. Then press Esc and type: wq to save the configuration.
n. So also to the other scripts. Perform reconfiguration at all accept that there are scripts on the Server (DigiServer) users, when the user has configured the server interface (DigiServer) users.
o. If all the scripts already received re-configured. Then the user can restart the server (DigiServer) to renew the process of receiving data. By using the following command line.
[root @ digiserver ~] # reboot
p. If it is booting again, the receipt of data has been re-configured by the user.
XORP as multicast routing.
a. If users change the configuration of Ethernet interfaces on DigiServer, then the user must change the configuration xorp (multicast routing).
b. For example, the default system DigiServer has 1 interface which is connected to eth0 and DigiBox ie 1 interface that connects to the user’s local network is eth1.
c. Then the user has changed the configuration interface is connected to DigiBox Eth2 and the local network is connected to eth0
d. Then the user must perform the reconfiguration xorp on the Server (DigiServer).
e. Location xorp file located at / etc / xorp / myconfig.boot
f. Use the following command line to edit the configuration on the Server xorp (DigiServer).
[root @ digiserver ~] # vim / etc / xorp / myconfig.boot
g. Then it will appear as follows:
h. To edit the button i can use or insert on the keyboard user. Just like the user to configure the IP Address.
i. Change the configuration on myconfig.boot with provisions like the following.
• By default there are eth0 and eth1 configuration on myconfig.boot
• By default, eth0 is the interface that connects to DigiBox.
• By default, eth1 is the interface that connects to local network users.
• By default there is 192.168.1.254 on the configuration myconfig.boot rp
• Modify eth0, in accordance with a user interface configuration. Example, hange eth0 to eth2.Customize the interface that connects to DigiBox.
• Change eth1, in accordance with a user interface configuration. Example, change eth1 to eth0.Customize the interface that is connected to local network users.
• Change the rp rp 192.168.1.254 192.168.1.x
• With the provision 192.168.1.x is the IP Address that is being used by DigiBox.
• It is expected that users not change the other part, other than the ethernet. Because the configuration script has been adapted by receiving SEAEduNet Center (SEAMOLEC).
j. If you’ve finished configuring, press Esc and type: WQ, to save the configuration.
k. Then the user can restart the server (DigiServer) to update the multicast routing process is configured. By using the following command line.
[root @ digiserver ~] # reboot
l. If it is booting again, then re-routing multicast is configured by a user.
SEA EduNet, is an affordable solution for people who experience difficulties in receiving data, especially for the education process. Why is affordable? Because the system is easy to apply, simply by satellite dishes, modems, 1 unit of PC as a Server / Router and 1 other PC as a client. Then, in terms of cost, the total will not exceed 10 Million. And special monthly fees, when working with satellite TV provider then simply pay a monthly fee from these providers of magnitude less than the 150 thousand a month.
This solution also has been able to intelligently bridge the shortage of Internet technology, especially the bandwidth is still very difficult in some areas Indonesia and in Southeast Asia in general.
With good content and useful, then the SEA EduNet can be a tool of quality improvement and equity in education is very powerful and masakini future.
Finally we as the student who was on duty in the preparation of this book SEA tangible results thanks to the people – men as well as relatives, lecturers, and the father of Khalid as the IT Network Manager SEAMOLEC who has guided us from beginning the preparation of this book until the final stages completion of this book, and we also thank SEAMOLEC because this is a new beginning for us who have been given the opportunity to be able to study and work in a professional manner to produce a work that is easy – I hope it will be useful to readers.
Southeast Asia Education Network
Distance Education Solutions using Multicast-Based Network
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