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Why it is a bad idea to drop packets using l7-filter on mikrotik

Why it is a bad idea to drop packets using l7-filter on mikrotik

firewall, L7-filter, Regex
[caption id="attachment_1079" align="alignleft" width="300"] picture from wikipedia[/caption] This article will explain the effect on RouterOS if you drop packets using l7-filter on mikrotik. As we know from previous articles here,  mikrotik supports Regex for pattern matching. one of its purpose to match traffic based on information on layer 7 (application layer). Mikrotik has wiki page that explain how the L7 filter works. and on that page, they already warns user that using l7-filter for dropping packet will increase CPU usage and cause router instability. (more…)
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August 2017, GLC Webinar: BGP filter on mikrotik

August 2017, GLC Webinar: BGP filter on mikrotik

webinar
BGP filter on mikrotik. In this webinar, we start the discussion with an introduction to BGP like AS to AS connection, comparison BGP routing and traditional routing, also BGP peering. we then talk about problem that might occur during BGP peering, its effects, and the solution. finally we cover an example of how to configure BGP filter on mikrotik. (more…)
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July 2017, GLC Webinar: VRRP on Mikrotik

July 2017, GLC Webinar: VRRP on Mikrotik

webinar
vrrp on mikrotik. In this webinar, we discuss a mikrotik feature that is called VRRP (Virtual Router Redundancy Protocol ) which could provide dedundancy on the your network. We started the webinar by introducing the VRRP protocol, then discuss an example implementation on Mikrotik Router. some mistakes on VRRP configuration were also covered here. (more…)
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July 2017, GLC Webinar: Mikrotik Fasttrack

July 2017, GLC Webinar: Mikrotik Fasttrack

webinar
Mikrotik fasttrack. In this webinar, we discuss a feature from mikrotik routerOS that is called fasttrack. This feature will improve routerboard performancce for particular connection. unlike fastpath, using fasttrack requires trigger from firewall filter/mangle. Correct understanding of connection and connection-tracking is very crucial when configuring the trigger. (more…)
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Why don’t you build your own ISP (Internet Service Provider)

Why don’t you build your own ISP (Internet Service Provider)

internet, ISP, tips
In the previous article, we know that the internet cost is actually free, because we just connect to each other at the IXP. However, many internet users are living far from the IXP, which means there is a business opportunity that offers connection from user's devices to the IXP. This kind of company that offer "internet connection" later in is called Internet Service Provider or ISP. In this article, we discuss "why dont you just build your own ISP", get connection to the internet and share it to users with price. (more…)
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What is internet? IXP? how it works?

What is internet? IXP? how it works?

internet, telecommunication
First assumption before reading this article is you (readers) already have experience of connecting to internet, either by checking email, browsing website, transfer file, and many other things. In the previous article, you know that we can build a network using devices like router and switches. with network computers can communicate to each other through a media. internet actually, is just a collection of network where computer can access each other.  This article will talk about how internet works. (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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