Blog – Mikrotik Tips

Aug62020 by Achmad MardiansyahNo Comments

Common mistake on mikrotik configuration: forgot to use netmask

Common mistake on mikrotik configuration: forgot to use netmask. This mistake often made by those who are new to Mikrotik RouterOS. If no mask provided, then RouterOS will automatically assign /32 mask on the IP address, which result the router cannot access anywhere. Solution: always put netmask everytime you configure IP address

Nov82019 by Achmad Mardiansyah2 Comments

Combining 8 ISPs with a single mikrotik device

GPON, layer 2, Layer 3, load balancing, PCC

Hello all, this time, we would like to share our project of combining 8 ISPs with a single Mikrotik device. So, our client already subscribes to internet connections from 8 different ISPs, and want to use them to provide internet connections to his customers. The reasons are simple: For availability purposes. If one connection is down, the customer is still able to connect via other links (there are eight connections in total, you know that, right? :-p) To increase capacity and also sharing traffic load among the connections. These mean let say if each link has a 100 Mbps datarate, having 8 of them will result in 800 Mbps in total. Sounds good, right? so this is what we did: configure ONU modems to be in the bridge-mode. The upstream…

Jun142019 by administratorNo Comments

June 2019, MUM Kuala Lumpur, Troubleshooting load balancing

load balancing, PCC

GLC networks participated on Mikrotik User Meeting (MUM) Kuala Lumpur, Malaysia, on June 12, 2019. Recorded presentation is available on youtube below: and presentation slide is available on slideshare: Troubleshooting load balancing from Achmad Mardiansyah

Jan92019 by Achmad MardiansyahNo Comments

Observing the DDOS/probing attack with Mikrotik device

DDOS attack, firewall, probing attack, security

We got a question from students, how the DDOS attack looks like? are they similar to probing attack? In this article, we will talk about it and monitor the attack with the MikroTik router. In order to observe, we need to set up a network topology that allows us to see all packets that are flowing on the network, by having a central point as the main connection hub, it gives us better observability as inbound and outbound traffic will go through the same place, not scattered through different links. Now, let's talk about the tools we are using. The first tool we can use to monitor the traffic flows is the firewall connection. It has a filter where you can use it to focusing on a particular connection like…

Sep242018 by muhammad heksarialdiNo Comments

Pengenalan Mikrotik

Uncategorized

Mikrotik merupakan sebuah brand perangkat jaringan Komputer yang di kembangkan pada tahun 1996, oleh John dan Arnis dengan berbasis Linux. Perangkat ini di Kembangkan di Negara Latvia. Mikrotik sendiri itu memiliki berbagai macam bentuk dimana bentuknya ada yang berbentuk OS yang dinamakan RouterOS (ROS), SwitchOS, dan RouterBoard, jadi dulu itu Mikrotik menggunakan PC sebagai Router yang telah di instal RouterOS di dalamnya untuk melayani pelangan yang berada di daerah Latvia. RouterOS sendiri itu merupakan softwere Copy Left atau tidak open source serta available pada X86. Untuk mendownload RouterOS sendiri bisa langsung aja ke linknya www.mikrotik.com/download. Untuk RouterBoard sendiri itu merupakan versi hardwere yang sudah terdapat RouterOS dan SwitchOS di dalam perangkat tersebut. Keunggulan dari RouterBoard itu salah satu diantaranya yaitu tidak membutuhkan banyak interface/ethernet tambahan karena RouterBoard sudah memiliki Interface…

Sep242018 by bima darulNo Comments

Apa itu jaringan komunikasi?

Uncategorized

Assalamualaikum wr.wb "Ok, Pada postingan kali ini kita akan membahas tentang jaringan komunikasi. jadi apa itu komunikasi?" "Jadi komunikasi adalah pertukaran informasi dari 2 belah pihak ataupun lebih. komunikasi tentunya sudah ada sejak dahulu kala. komunikasi tidak hanya dilakukan oleh manusia. tentu saja semua makhluk hidup berkomunikasi, tetapi dengan cara yang berbeda-beda satu sama lain sehingga tidak dipahami oleh yang lain" Sejarah Komunikasi : "Dimulai pada masa prasejarah, dimana dijaman ini komunkasi digunakan oleh manusia untuk sistem untuk pengenalan bentuk-bentuk yang dikenal manusia. mereka menggambarkan informasi dengan cara menggambarnya pada dinding-dinding gua tentang berburu dan binatang buruannya. selanjutnya juga dikembangkan alat komunikasi berupa gendang, terompet, dan asap sebagai alat komunikasi" "Berlanjut ke jaman 3000SM, ini pertamakalinya tulisan digunakan…

Sep172018 by Achmad MardiansyahNo Comments

FULL-routes vs partial-routes on BGP

BGP, Layer 3, routing table

In the previous articles, we already talk about setting up a BGP session between routers in the form of peering. When a BGP session established, the routers will start to exchange their routing prefix, put them into the main routing table, apply BGP best-path algorithm, and the router will have optimized routes that will be used for FIB (Forwarding Information Base). FULL-routes vs partial-routes on BGP. A question arises, are those routes full or partial? What's the difference between them? Which one should I pick? Ok here it is: FULL-routes a FULL-routes is a whole prefix in the (BGP) world, meaning a collection of all prefix/routes of any AS in the world. in 2018, there are 700 thousand routing entries in FULL-routes, and it keeps growing. It will stop growing…

Jun112018 by Liem AgungNo Comments

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…)

Jan152018 by Achmad MardiansyahNo Comments

January 2018, MUM Manila, Philipines, GLC Networks Presentation : BGP vs OSPF

BGP, BGP session, internet, ISP, Layer 3, Layer 4, Layer 5, load balancing, Router

This is a presentation from GLCNetworks at Mikrotik User Meeting, Manila, 15 january 2018. We talked about the essential differences from BGP and OSPF routing protocol, which is important for those who plan to operate both. MUM agenda is available here: https://mum.mikrotik.com/2018/PH/info/EN This topic is part of GLC Networks training. For more information, please contact us here or stay tuned with our schedule. Recording is available here: Presentation slide can be accessed here: Mikrotik User Meeting Manila: bgp vs ospf from Achmad Mardiansyah

Jan52018 by Achmad Mardiansyah6 Comments

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…)