Intranet vs Extranet

Intranet vs Extranet

firewall, internet, IP address, Layer 3, logical topology
Intranet vs Extranet. Untuk beberapa orang mungkin istilah ini sudah tidak asing lagi, tapi bagaimana dengan yang lain? apa sih intranet itu? atau apa itu extranet? seperti apa penerapan intranet itu? apa perbedaan intranet dan extranet? dan lainnya lagi. Pada artikel kali ini saya akan membahas tentang Intranet vs Extranet. Apa itu Intranet? Anda pernah membuat atau menggunakan koneksi jaringan yang dimana hanya bisa diakses ditempat anda terhubung? Atau mungkin anda pernah bertindak sebagai FTP client disuatu organisasi, dimana service FTP tersebut hanya bisa digunakan ketika kita terhubung dengan jaringan di organisasi tersebut? Nah, hal itu termasuk kedalam Intranet. Jadi Intranet itu adalah sebuah jaringan LAN (local area network) yang menggunakan standar komunikasi LAN dan hanya dapat diakses oleh internal saja. (more…)
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Why it is a bad idea to block youtube IP address?

Why it is a bad idea to block youtube IP address?

IP address, L7-filter, layer 7
[caption id="attachment_1136" align="alignleft" width="251"] no youtube in our office[/caption] so, at my client's office, there was a need to block youtube access during working hours (08:00-17:00). the local administrator there tried to create rules on mikrotik router OS firewall, using layer7-filter, block youtube ip address, and the result is more complaints from user :-( (more…)
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Do you really need a layer 3 switch? don’t have to be tricked by sales guy…

Do you really need a layer 3 switch? don’t have to be tricked by sales guy…

layer 2, Layer 3, Router, switch
So one day, after attending a Mikrotik User Meeting in Indonesia, i had a chance to have a talk with an employee of a retail company in Bandung. H told story about a network implementation project on his company, where they put Mikrotik as main router to forward traffic between internal networks, and the networks were created with the help of VLAN technology. ok sound cool so far... he then continued confidently "we use a cool layer-3-switch that makes our network stable". "ok" i nodded, "so what did you configure on your fancy layer-3 switch", i replied. and he said, "well, we configure VLANs there, and route the traffic using our mikrotik router" (that means he just configured the layer-3-switch for VLAN only. all traffic between network or inter-VLAN traffic…
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Routerboard selection guide: switch

Routerboard selection guide: switch

layer 2, Layer 3, Router, Routerboard, switch, SWOS
So, many years ago (before 2014), Mikrotik just produced switches for small network. Therefore, when we build a network that requires high-port density (requires many ethernet ports), we use products from other vendors. Mikrotik at that time was used as a routing device. This article will talk about Routerboard selection guide: switch But now in 2017, mikrotik product portfolio has improved, and you already see some switches products on the list. Why ethernet switch? Not token ring or other? Because Ethernet is the technology that people use most. Its cheaper, easy to get and install, and still evolving to support higher and higher data rate. That is why Mikrotik produces ethernet switches. (more…)
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How packets travel over network by using Layer 2 and 3 information

How packets travel over network by using Layer 2 and 3 information

layer 2, Layer 3
How packets travel over network by using Layer 2 and 3 information. This is a class-based course about Networking. In this session we were discussing how packets travel on the network using layer 2 (data link) and layer 3 (network) information. We decided to explain the concept using simulation, asking a volunteer from students  to become a packet that travels over network. On his front, we put "headers" information (layer 2 and 3) so router can use that information to forward the packet to destination. (more…)
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Routing protocol vs routed protocol

Routing protocol vs routed protocol

Layer 3, routed protocol, routing protocol
Routing protocol vs routed protocol. Kebetulan lagi iseng baca artikel rekan saya tentang routing & routed protocol. kliatannya rekan saya ini lagi semangat-semangatnya belajar networking. Sebuah kritik positif terhadap artikel tersebut adalah kurang jelasnya mendefinisikan perbedaan fundamental antara routing protocol & routed protocol. bisa jadi juga karena kendala bahasa (english) dimana akan susah dimengerti jika ditranslate ke indonesian. so, saran saya, kalo belajar IT sebaiknya langsung dari bahasa aslinya. (more…)
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